One can apply the below rules in reverse order to convert the given sentence in direct speech.

Rules for changing the direct speech into indirect speech are given below:

• The inverted commas (“ “) used in Direct Narration is removed in Indirect Narration and “that” conjunction is used.
• Says to/said to changes to tells/told in indirect speech if they are followed by an object. If not, they would remain same in indirect speech.

      How to changes the tense in indirect speech

• If the reporting verb is in present or future tense, no changes are made to the verb/tense of the reported speech.
• If the reporting verb is in past tense, we make changes to the reported verb as per the below rule:
• Simple present tense changes to simple past tense.
• Present continuous tense changes to past continuous tense.
• Present perfect tense changes to past perfect tense.
• Present Perfect continuous tense changes to past perfect continuous tense.
• Simple past tense changes to past perfect tense.
• Past continuous tense changes to past perfect continuous tense.
• No changes are made to past perfect and past perfect continuous tense.
• Can, shall, will, may, must changes to could, should, would, might and must respectively.
• If there are any universal truth, habitual fact in the reporting speech, no changes are made to the reported verb’s tense.

How some words change in indirect speech

• Words like “this, these, tomorrow, yesterday change to that, those, the next day, the previous day” respectively.

Below are the rules for changing the pronouns correctly:

• First person pronoun changes according to the subject of reporting speech.
• Second person pronoun changes according to the object of reporting speech.
• Third person pronoun does not change in indirect speech.

This is a simple sentence. The rules for changing such sentences into indirect speech are given below:

• The inverted commas (“ “) used in Direct Narration is removed in Indirect Narration and “that” conjunction is used.
• Said to changes to told in indirect speech since it is followed by an object.
• The reporting verb is in the past tense, changes to the reported verb are made as per the rule: Simple present tense changes to simple past tense and "will" changes to "would". 
• First person pronoun (I) changes according to the subject of reporting speech (Owner). "I" changes to "she".
• Second person pronoun (you) changes according to the object of reporting speech (servant). "You" changes to "she".

This is a direct narration of exclamatory sentence. We change such sentences in indirect narration using following rules:

• Said is changes to exclaimed/exclaimed with joy/exclaimed with sorrow/ exclaimed with grief/ confessed with regret/ shouted with applause/ cried out/ eagerly wished.
• If the reporting verb is in present or future tense, no changes are made to the verb/tense of the reported speech. In such cases, says to changes to tells/comments.
• Inverted commas (" ") are removed and that is used instead.
• The verb and tense of the reported speech changes accordingly.
• Sign of exclamation (!) if given is removed and full stop is used.
• If the reported speech starts with the word "what", it changes to "very" in indirect narration.
• The words like, this, these, tomorrow, yesterday change to that, those, the next day, the previous day respectively.

• If the reporting verb is in past tense, we make changes to the reported verb as per the below rule:
• Simple present tense changes to simple past tense.
• Present continuous tense changes to past continuous tense.
• Present perfect tense changes to past perfect tense.
• Present Perfect continuous tense changes to past perfect continuous tense.
• Simple past tense changes to past perfect tense.
• Past continuous tense changes to past perfect continuous tense.
• No changes are made to past perfect and past perfect continuous tense.

Below are the rules for changing the pronouns correctly:

• First person pronoun changes according to the subject of reporting speech.
• Second person pronoun changes according to the object of reporting speech.
• Third person pronoun does not change in indirect speech.

This is an imperative sentence. The rules for changing such sentences into indirect speech are given below:-
The inverted commas (“ “) used in Direct Narration is removed in Indirect Narration. 'Said' will be changed to 'asked'. As the reporting verb has an object, then we use “to” after 'asked' to connect. Tense of the sentence will remain the same.
Hence, option C is the correct answer.

Rules for changing the direct speech into indirect speech are given below:

• The inverted commas (“ “) used in Direct Narration is removed in Indirect Narration and “that” conjunction is used.
• If the reporting verb is in present or future tense, no changes are made to the verb/tense of the reported speech.
• If the reporting verb is in past tense, we make changes to the reported verb as per the below rule:
• Simple present tense changes to simple past tense.
• Present continuous tense changes to past continuous tense.
• Present perfect tense changes to past perfect tense.
• Present Perfect continuous tense changes to past perfect continuous tense.
• Simple past tense changes to past perfect tense.
• Past continuous tense changes to past perfect continuous tense.
• No changes are made to past perfect and past perfect continuous tense.
• Can, shall, will, may, must changes to could, should, would, might and must respectively.
• If there are any universal truth, habitual fact in the reporting speech, no changes are made to the reported verb’s tense.
• Words like “this, these, tomorrow, yesterday change to that, those, the next day, the previous day” respectively.

Below are the rules for changing the pronouns correctly:

• First person pronoun changes according to the subject of reporting speech.
• Second person pronoun changes according to the object of reporting speech.
• Third person pronoun does not change in indirect speech.

The given sentence is an interrogative sentence. Therefore, the reporting verb will be changed to “asked”. Since it is a WH-question, we don’t need a conjunction here as “what” will act as a connector. The sentence is in simple present tense, therefore, it will change to simple past tense. Also, we will convert the interrogative sentence into a simple sentence (Subject followed by a verb). Hence, option A is the correct answer.

The given sentence is in Direct Speech because it quotes actual words. Therefore, it must be changed into Indirect Speech.

Also, the first part of the sentence is interrogative.

To convert interrogative sentences into indirect speech, follow the following rules along with the above-mentioned rules:

• The reporting verb ‘said’ is changed to ‘asked’.

• If the reporting speech is having the reporting verb (can) at it its start, then if' is used in place of that.

• The present tense (can) is changed to the past tense (could).

• The pronoun ‘me’ is changed to ‘her’.

The second part of the sentence contains 'reply' to the question asked by Kanika. We will use the conjunction ‘and’ to connect the two parts of the question. Also, the verb ‘could’ will be used to maintain parallelism.

Therefore, the sentence in Indirect Speech will be :- Kanika asked if I could help her in lifting that box and I replied that I could not.

Hence, option C is the correct answer.

The given sentence is in Direct Speech because it quotes actual words. Therefore, it must be changed into Indirect Speech.

Also, in the given sentence, Harsh has given a suggestion to conduct a virtual meeting. Hence, ‘suggested’ is the apt reporting verb here. We use the gerund form of the verb after ‘suggested’, hence, ‘conducting’ is the correct verb.

Therefore, the sentence in Indirect Speech will be :- Harsh suggested conducting the virtual meeting.

Hence, option A is the correct answer.

The given sentence is in Direct Speech because it quotes actual words. Therefore, it must be changed into Indirect Speech. Therefore the following rules must be followed:

The reporting verb is in the past tense (asked), the tense of the verbs in the reported speech will be changed into their corresponding past tense. (present simple to past simple)

Direct speech may consist of statement + question. Normally each requires its own introductory verb.

The second part of the sentence is an interrogative sentence. The reporting verb ‘said’ is changed to ‘asked’.

If the Interrogative sentence begins with the Auxiliary Verb / Helping Verb, the connective “Whether or if” is used to join it. So there should be “if” after “asked”.

“He” comes according to “the taxi driver” and “she” according to “her”.

A full stop is placed at the end of the sentence instead of a mark of interrogation.

Therefore, the sentence in Indirect Speech will be:

The taxi driver said he didn’t know the way to the airport and asked her if she did.

Hence option B is correct.