Section 12(1)(a) of the Hindu Marriage Act, 1955 is related to:

Under Section 12(1)(a) of the Hindu Marriage Act, 1955 (as amended by the Marriage Laws (Amendment) Act, 1976), a marriage is voidable and may be annulled by a decree of nullity on the ground that the marriage has not been consummated owing to the impotence of the respondent. Mental disorder is a ground under Section 12(1)(b) read with Section 5(ii), while consent obtained by force or fraud is a ground under Section 12(1)(c).