Option (1) is incorrect: Insanity is a valid ground for getting a marriage annulled.
Option (2) is incorrect: Insanity is a valid ground for judicial separation.
Option (3) is incorrect: Insanity is a valid ground for divorce.
Option (4) is correct: Insanity is a valid ground for getting a marriage annulled, judicial separation and divorce under Sections 12, 10 and 13, respectively.