(1) This rule applies if a person does not give an answer, or gives an insufficient answer, to an interrogatory.
(2) The court may—(a) order an answer or further answer be given under rule 231 ; or(b) order the person to attend to be orally examined; or(c) if the person is not qualified to make the affidavit verifying the statement in answer to the interrogatories—order a qualified individual to attend to be orally examined.
(3) This rule does not limit the powers of the court under rule 237 .