Option (1) is correct: Section 15(1) of the Hindu Succession Act, 1956 includes husband of a subsisting marriage.
Option (2) is incorrect: Section 15(1) of the Hindu Succession Act, 1956 does not include a divorced husband.
Option (3) is incorrect: Section 15(1) of the Hindu Succession Act, 1956 includes husband of a subsisting marriage only.
Option (4) is incorrect: Only option (1) is correct.