मानव शरीर की सबसे बड़ी कोशिका होती है ?

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'

He was very much engaged (a)/ in his work when the thieves (b)/ entered into his house (c)/ and took away a lot of things. (d)/ No error (e).

Direction: In the following questions, out of the four alternatives, choose the one which can be substituted for the given sentence.

A person who believes in the total abolition of war –

Select the option that expresses the given sentence in active voice.

My request should be considered.