What is the plural form of the word "child"?

The amount of data stored (A)/were so vast that (B)/even if we put a number on it, (C)/it would be beyond our comprehension (D).

Find the erroneous part of the given sentence. If none of the parts contains error, mark ‘No Error’ as your answer.

Good people will make good laws (a) / but good laws passed by a few does not (b) / necessarily make a good society (c) / No Error (d) 

Born on December 17, 1924 he studied at Chennai’s R.S. High School, after which he joins Presidency College.

Identify the erroneous part of the sentence.

The officer asked / whether I could explain / why had I left / the meeting early.

It is not difficult to sense country’s displeasure, even granting its rough diplomat disposition.

(A) to ensure economic stability

(B) interest rates may be adjusted

(A) the central bank is monitoring inflation rates,

(i) since

(ii) as

(iii) however

In Delhi, he (a)/ suddenly came across many (b)/ of his friends who had settled there. (c) / No Error (d)

Each sentence is divided into four parts (A), (B), (C), and (D).