A marriage is voidable under section 12 of the Hindu Marriage Act, 1955 on the ground of :

Both mental and physical incapacity are grounds on which a marriage is voidable under section 12 of the Hindu Marriage Act, 1955. Section 12(1)(a) covers non-consummation owing to the respondent's impotence (physical incapacity), while section 12(1)(b) covers contravention of the mental-capacity conditions in section 5(ii).