The correct answer is option 4 i.e. careful while executed the.

The segment that contains a grammatical error is "careful while executed the" as it should be "while executing the".

The verb "executing" needs to be in the present participle form to match the auxiliary verb "should be" which is in the present tense.

Thus, the correct sentence would be:

The manager told her that she should be a bit more careful while executing the orders of the company.

The correct answer is option 2 i.e. Centre for Policy Research estimate.

The subject "the Centre for Policy Research" is singular because it refers to a single entity (an organization).

Therefore, according to subject-verb agreement, the verb must also be singular in the present tense.

The correct singular form is "estimates", not "estimate". 

The correct sentence is- "Although there is no proven data, the Centre for Policy Research estimates that India has the largest stock of iron ore in the world."

The correct answer is option 2 i.e. there was collusion between objectors, due to similarities.

The phrase there was collusions through objectors, due to similaritites is incorrect.

It will be collusion not collusions because collusion doesn't have a plural form.

Also, "between" is the correct preposition to be used with collusion to reflect cooperation.

The correct answer is Option 4. i.e. The food is prepared by the chef in the kitchen.

In the passive voice, the object of the active sentence becomes the subject, the verb is changed to its passive form, and the original subject is mentioned as the agent is introduced by the preposition "by."

The prepositional phrase remains in the same position.

Active Voice Structure: Subject + Verb + Object + Prepositional Phrase

Passive Voice Structure: Object (from the active sentence) + Verb (in passive form) + Agent  ('by') + Prepositional Phrase

The correct answer is option 1 i.e. He said to me, “When did you book the flight tickets?”

In direct speech, we need to add commas and inverted commas.

Asked is changed to said to.

Second-person pronouns are changed according to the object of the reporting verb, so, I is changed to you.

Had booked is changed to did book. Had booked is in the past perfect tense. However, in direct speech, the verb tense reverts to the simple past (did book) to reflect the original question being asked.

A direct question is formed, so we invert the subject you and the auxiliary verb did in the question.

So, the final sentence is: He said to me, “When did you book the flight tickets?”

The correct answer is option 3 i.e. proverb.

Maxim means a short, pithy statement expressing a general truth or rule of conduct.

Proverb means a short, well-known pithy saying, stating a general truth or piece of advice.

"Adverb" and "Maximum" are self-explanatory.

Phoneme is any of the perceptually distinct units of sound in a specified language that distinguish one word from another.

Correct Answer: Option – Fractional

Given Word: Nominal

Meaning: Very small; existing in name only; minimal

Example: The company charges a nominal fee for membership.

Synonym: Fractional

Meaning: Very small in amount or degree; minimal

Example: The membership fee was fractional compared to the overall cost of the program.

Meaning of the other words:

Limited → restricted, not necessarily minimal

Actual → real or existing, opposite of nominal

Supposed → assumed or believed, not synonymous

Hence, the chosen option will be correct.

The correct answer is option 4 i.e. active.

"Dormant" means not active for some time.

The antonym of "dormant" is "active."

"Active" means involved in activity; lively.

The sentence implies that the speaker's bank account has not been used for a year.

The correct answer is option 4 i.e. Admirable.

"Despicable" means deserving hatred and contempt.

The antonym of despicable is admirable.

"Admirable" means deserving respect and approval.

The other option means:

• Rational means based on reason or logic.
• Deplorable means deserving strong condemnation or shock.
• Offensive means causing someone to feel deeply hurt, upset, or angry.

The correct answer is option 3 i.e. A short nap. 

The correct meaning of the idiom "Forty winks" is: A short nap.

This idiom refers to a brief period of sleep or nap, often during the day.