The scientists in America (a)/ are trying for long (b)/ to discover the genes responsible for ageing. © / No error (d)

Each question in this section has a sentence with three underlined parts labelled (a), (b) and (c). Read each sentence to find out whether there is any error in any underlined part and indicate your response in the Answer Sheet against the corresponding letter i.e., (a) or (b) or (c). If you find no error, your response should be indicated as (d). All scientists agree (a)/ that there should be(b)/ a total ban on nuclear explosions. (c)/ no error(d)

Read each sentence to find out whether there is any grammatical error in it. The error if any, will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is ( e ) (ignore the errors of punctuation, if any.) On discovering that (a)/ it was a forgery (b)/ he torn up the agreement (c)/ he had signed. (d)/ No error (e).