The best-known polytheistic religion is

Hinduism

Explanation:

Polytheism is the belief in many gods or their worship. It results from beliefs in spirits, demons and supernatural forces, vaguely defined in beliefs as animism, totemism and worship of the ancestors. Supernatural forces are organized and personified into a cosmic family that is the core of the belief system of a people or ethnicity.

Of all the five major religions in the world in numbers of believers, Hinduism is the only belief with polytheistic characteristics - though believers believe in a supreme god.  The Hindu gods reveal themselves in various forms and genres. Hindus recognize and believe in various gods, but they are part of a supreme god.

answer; knowledge,reason,and judgement;