The first appellate court upon appreciation of the entire evidence led on record has clearly noticed that all the material averments as regards the alleged fraud, concealment of the nature of mental illness etc. have been made in paras 7 to 12 of the plaint. In the reply filed on behalf of the defendants-respondents to the corresponding paras, there has been a categoric denial. In such a situation, the plaintiffs-appellants having raised a plea that on account of the act and conduct of defendant-respondent no.3 of concealment and further the fact of self disclosure of the mental disorder and the same having been categorically denied, it was incumbent upon the plaintiffs-appellants to have confronted the defendant-respondent no.3 with such factual situation in cross-examination so as to substantiate and corroborate their plea. However, the first appellate court has noticed that the instances of imperfect marital intercourse, beatings to plaintiff-appellant no.3, self disclosure of mental ailment and treatment thereof by defendantrespondent no.3 were never put to DW-3, Pritesh Bhushan, defendantrespondent no.3. On the other hand, PW-3 Amarpali Panthi, i.e. plaintiffappellant no.3 has herself admitted that she has no documentary proof to show that her former husband was abnormal. It has also been noticed by the courts below that even the judgement and decree dated 3.9.2005 passed in Petition No.6 of 2005 Ex. P-2 for annulment of marriage was allowed exparte. Even in that case, plaintiff-appellant no.3 had not brought forth any documentary evidence with respect to the mental ailment of defendant-