He ought not to tell me your secret, but he did.

Look at the underlined part of sentence. Below sentence is given three possible substitutions for the underlined part. If one of them (a), (b) or (c) is better than the underlined part, indicate your response on the Answer Sheet against the corresponding letter (a), (b) or (c). If none of the substitutions improve the sentence, indicate (d) as your response on the Answer Sheet. Thus a 'No improvement' response will be signified by the letter (d). Anil ought not ul"to tell" me your secret, but he did.