In this question, you`re asked which state in India passed legislation in 1996 that requires the maintenance of one`s parents to be mandatory. The legislation pertains to an obligation for children to take care of their parents.
Option 1, Kerala, is incorrect as this state did not pass such a legislation in 1996. The same goes for Option 2, West Bengal, and Option 3, Maharashtra. They haven`t passed laws making it compulsory for children to provide for their parents.
Option 4, Himachal Pradesh, is the correct answer. The state of Himachal Pradesh in India passed the `Himachal Pradesh Maintenance of Parents and Dependants Bill` in 1996, making it legally mandatory for children to provide maintenance to their parents.