The judge asked me-----I knew the accused or not.

Explanation

In indirect speech, when converting a yes/no question, we use 'if' or 'whether' to introduce the clause. Both 'if' and 'whether' are correct choices in this context:If: Commonly used in informal contexts or when the question is straightforward.Whether: Preferred when formally presenting alternatives, especially with 'or not'.Option both A and B is the correct .