The correct option is 3 (Order 19, Rule 1).

Order 19, Rule 1 of the Code of Civil Procedure (CPC) deals with the power of the court to order any point to be proved by affidavit. This rule allows the court, at any stage of the proceedings, to direct that any point of fact in the case may be proved by affidavit, thus simplifying the process of presenting evidence. This can be particularly useful in cases where the facts are not in dispute and where the need for oral examination of witnesses can be minimized.