The correct answer is: B. He requested the interviewer to please repeat the question.
The sentence “He said to the interviewer, ‘Could you please repeat the question?'” is a request. The speaker is asking the interviewer to repeat the question. The word “please” is a polite way of making a request. The word “repeat” means to say something again. The word “question” means a statement that is asked to be answered.
Option A is incorrect because it uses the word “if.” The word “if” is used to ask a question. In this sentence, the speaker is not asking a question, he is making a request.
Option C is incorrect because it does not use the word “please.” The word “please” is a polite way of making a request. In this sentence, the speaker is using a polite way of making a request.
Option D is incorrect because it uses the word “could.” The word “could” is used to ask permission. In this sentence, the speaker is not asking permission, he is making a request.