58.
The answer is: B
Explanation
The correct option is B: Affidavit.
According to Section 26 of the Code of Civil Procedure, 1908, every suit shall be instituted by the presentation of a plaint or in such other manner as may be prescribed. In every plaint, facts shall be proved by affidavit. An affidavit is a written statement of facts that is sworn or affirmed to be true by the person making it before a person who has authority to administer an oath or affirmation.
An affidavit is a mode of proving facts in a civil suit and it has the same effect as oral evidence.