Question

in an interview when you do not know an answer you should-
(a)admit you do not know the answer
(b)keep guessing
(c)remain quiet
(d)bluff

Answer 1

Keep Guessing For Some time

Answer 2

(a) admit you do not know the answer
Reason - In any interview, interviewer always want to know how honest you are....So that it will be helpful for him or for his job.
If you pretend that you know the answer and will take a long break it will be a bad impression. So I suggest you to be honest and tell him that you don't know and say sorry to him respecfully.
But sometimes it helps, but it happens in very rare cases, so it is convenient to admit that, if you want to secure your job.....
Hope it will help you!