(1) The following are the only grounds on which a person may object to answering an interrogatory—(a) the interrogatory does not relate to a matter in question, or likely to be in question, between the person and the interrogating party;(b) the interrogatory is not reasonably necessary to enable the court to decide the matters in question between the parties;(c) there is likely to be available to the interrogating party at the trial another reasonably simple and inexpensive way of proving the matter sought to be elicited by interrogatory;(d) the interrogatory is vexatious or oppressive;(e) privilege.
(2) The court may—(a) require the grounds of objection specified in a statement in answer to interrogatories to be specified in more detail; and(b) decide the objection.
(3) If the court decides the objection is sufficient, the interrogatory is not required to be answered.