Explanation:

- Option 1: Order 12, Rule 1: This rule generally deals with admissions of a case by parties in legal proceedings, and not about suing partners in the name of the firm.

- Option 2: Order 10, Rule 9: This pertains to the examination of parties by the court, not related to suing partners in a firm's name.

- Option 3: Order 19, Rule 6: Concerns affidavit procedures and associated matters, and does not involve suing partners in a firm.

- Option 4: Order 30, Rule 1: This specifically deals with the procedure for suing and being sued in the name of a firm, which includes partnerships.