Under Section 7 of the Hindu Marriage Act, 1955, a Hindu marriage that is not properly solemnized according to the customary rites and ceremonies is considered void ab initio (void from the beginning). This means it has no legal effect whatsoever, as if it never existed. A voidable marriage (option B) is one that is valid until annulled by a court, but improper solemnization makes it void, not voidable.