If a party fails to answer an interrogatory sufficiently, the party applying for the written answers may apply to the Court for an order:
(a) that the other party give a sufficient answer verified by affidavit in accordance with rule 21.04; or
(b) that the party, or a person mentioned in paragraph 21.04(1)(b), (c), (d) or (e), attend before the Court or a Registrar to be interrogated orally.