A party may object to
answering an interrogatory if the answer —
(a) is
irrelevant to the case;
(b) is
inadmissible in evidence under these regulations or any other law;
(c)
cannot practicably be disclosed;
(d) is
sought so as to harass or annoy, or to cause delay;
(e) is
frivolous, vexatious, scandalous or improper; or
(f) is
otherwise not genuinely required for the purposes of the case.