Religion teaches us not to run after the transient pleasures of the world.

Answer: Option A

Transient : lasting only for a short time; impermanent.
Permanent : lasting or intended to last or remain unchanged indefinitely.
Sinful : wicked and immoral; committing or characterized by the committing of sins.
Unnatural : contrary to the ordinary course of nature; abnormal.
Joyful : feeling, expressing, or causing great pleasure and happiness.

Antonym of Transient is Permanent