Chapter is a part of book in similar way, compartment is a part of the train.
Hence, option D is the correct answer.

Landline and Mobile both are two different device and both are used for communications.

Hence, option(D) is the correct response.

* Sample of pure water from any source always contains 88.8% by mass of oxygen & 11.1% by mass of hydrogen.

* Total amount of percentage is 100, therefore hydrogen and oxygen are divided in a constant ratio.

* H2O contains H and O in a fixed ratio by mass illustrating the law of constant composition or in other words law of conservation of energy.

* So, they are divided in a ratio of 1:8 therefore mass of Oxygen is 88.8%.

* The Mauryan Empire was founded by Chandragupta Maurya in 322 BCE.

* He dethroned the last Nanda ruler Dhanananda and founded the Mauryan dynasty with the capital at Pataliputra.

* He defeated Selucas Nikator, the general of Alexander in North West India in 305 BC.

* Selucas sent the Greek Ambassador, Megasthanese, to the court of Chandragupta Maurya.

* Chanakya (Vishnugupta) was the Prime Minister of Chandragupta Maurya.

* Brihadratha (187–184 BCE) was the last Mauryan ruler.

* Quintile ration is a measure of Economic Inequality.

* The income quintile share ratio is calculated as the ratio of the total income received by the 20% of the population with the highest income to that income received by the 20% of the population with the lowest.

* It is also called the "S80/S20 ratio”.

* One other such ratio is-The Palma ratio- which is also a measure of inequality. It is the ratio of the richest 10% of the population’s share of gross national income (GNI) divided by the poorest 40%’s share.

Viticulture = The study and production of grapes.

Horticulture = the study or activity of growing garden plants

Agriculture = Cultivation of crops.

Sericulture = Rearing of silkworms

Hence, option C is the correct answer.

The given sentence is of past perfect tense and it is in passive form.

The structures for active/passive voices are :-

Active Voice :- Subject + has/have + verb (IIIrd form) + object.

Passive Voice :- Object + has/have + been + verb (IIIrd form) + by + subject.

So, the passive voice of the given sentence would be: My brother has given me a very sweet candy. 

Hence, option B is the correct answer.

The underlined part is grammatically incorrect.

• The phrase 'hardly any' means 'almost none'.
  
  
• Also, if we talk about something that deals with abstract ideas or qualities, like relationships, you use “close” instead of “near.”
  
  
• Hence, the underlined segment should be replaced with 'any close' to form a grammatically correct sentence.

Let the marked price is 100x.

SP = MP

∴ SP₁ = 100x= 85x and

SP₂ = 100x= 81x

Now, SP₂ – SP₁ = 332

⇒ 81x – 85x = 332

⇒ 4x = 332

⇒ x = (332/4) = 83

∴ MP will be = Rs.8300