Registration of marriage may be made compulsory by the State Government under which section of the…

Section 8 of the Hindu Marriage Act, 1955 provides for registration of Hindu marriages: the State Government may make rules for registration and, under sub-section (2), make registration compulsory in the State, while sub-section (5) says that failure to register does not affect the validity of the marriage. So the answer is "Section 8". Section 12 deals with voidable marriages, section 14 bars divorce petitions within one year of marriage, and section 6 (guardianship in marriage) was repealed in 1978.