There is a married couple their marriage was performed in June 2012 and the wife stayed at in laws house for four months . Where she behaved in an strange way like she tried to kill her husband then various household activities done in an strange manner . Later it was discovered from a relative that she is Mental Patient and she has a phsycological problem so after knowledge of such fact . Father of the husband called father of Wife and brother and discussed about it where brother admitted that she was going through a mental treatment and yes she is mental patient and this has been recorded in phone as an audio clip. So in this case can a Nullity of Marriage be filed on the ground that such huge facts were untold to make fraud ? Whether audio clip is permitted in the court of law? Please help on it?