What is the polytheistic religion practice primarily in India

Hinduism

Hinduism is a synecdoche describing the similar philosophies of Vaishnavism, Shaivism, and related groups practiced or founded in Indian subcontinent. Concepts most of them share in common include: karma, caste, reincarnation, mantras, yantras and darsana. Hinduism is not a monolithic religion but a religious category containing dozens of separate philosophies amalgamated as Sanatana Dharma, which is the name by which Hinduism has been known throughout by its followers.