15.
The answer is: D
Explanation
The correct option is D: High Court with the previous approval of rules by the State Government.
This is based on Section 122 of the Code of Civil Procedure 1908, which states that:
High Courts not being the Court of a Judicial Commissioner may, from time to time after previous publication, make rules regulating their own procedure and the procedure of the Civil Courts subjects to their superintendence, and may be such rules annul, alter or add to all or any of the rules in the First Schedule.