In the following question sentence/a part of sentence is in bracket. Below are given alternatives to the word in bracket part at (a), (b), (c) which may improve the sentence. Choose the correct alternative. In case no improvement is needed , your answer is (d):Question: He denied that he (had not forged) my signature.

• A. would not forge
• B. had forged
• C. did not forge
• D. No improvement