Answer is b is correct. Section 13 of the Hindu Marriage Act, 1955 lays down the grounds on which a marriage can be dissolved through divorce. Therefore, option B is correct answer.

Answer is c is correct. Section 21 of the Hindu Adoption and Maintenance Act, 1956 lists the relatives who are considered "dependants" and are entitled to maintenance under certain circumstances. Therefore, option C is correct answer.

Answer is c is correct. In Muslim law, the age of puberty is presumed to be 15 years, and marriage is considered valid upon attaining puberty. Therefore, option C is correct answer.

Answer is a is correct. In Muslim law, marriage is void (Batil) if the parties are related by fosterage (milk relationship), as it is treated similarly to consanguineous relationships. Therefore, option A is correct answer.

Answer is d is correct. Talaq-ul-Biddat, also known as triple talaq, is an instant and irrevocable form of divorce in Sunni Muslim law, where the husband pronounces talaq three times in one sitting. Therefore, option D is correct answer.