35. Answering a claim
(1) Where the defendant receives a claim form he must file and serve an acknowledgment of service within the period specified in Rule 37.
(2) The defendant may also file and serve an admission in accordance with Rule 42, a defence in accordance with Rule 44 or an admission and a defence if he admits only part of the claim.
(3) Paragraph (1) does not affect the operation of Rule 36.