The correct answer is (c).
In the case of Shankari Prasad v. Union of India, the Supreme Court held that, “where the witness became confused in the course of his examination, the court could put questions to him to elicit the truth.” This is because the court has a duty to ensure that the truth is brought out in court proceedings. If a witness is confused, the court can help to clarify the witness’s testimony by asking questions.
The other options are incorrect. In the case of State of Rajasthan v. Eni, the Supreme Court held that the court could not put questions to a witness who was not competent to testify. In the case of D.C. Wadhwa v. State of Bihar, the Supreme Court held that the court could not put questions to a witness who was hostile to the prosecution. In the case of Lila Dhar v. State of Rajasthan, the Supreme Court held that the court could not put questions to a witness who was not a party to the case.