Question
My father had a brain stroke. As a result, he remained ill for two years and was unable to distinguish between good and bad. That is to say, he lost his mental senses. During this two year period, he was not able to perform his prayers or fasts. Since I am the family’s eldest son, is it obligatory for me to perform his missed prayers and fasts? Of course, I know that if he were fine, it would be obligatory for me to perform those missed prayers. I would appreciate your advice in this regard.
Category: Qaḍā’ Prayers of the Parents
Answer:
If his mental defect did not reach the level of insanity and he was not unconscious through out the whole time of prayers, you would be obliged to make qaḍā’ of his missed prayers and fasts, otherwise there is nothing obligatory for you.

Refrence:
Ref: www.leader.ir