What merged with native cultures on the indian subcontinent to form hinduism?

Vedic Tradition

Explanation:

Hinduism is the amalgamation of different beliefs, rituals, and traditions of India. It is a polytheistic form of religion where different Gods are worshiped. this particularly represents the diversity of India. Vedic culture was adopted by different native cultures to rise in the social ladder but they also retain their traditional culture and there seemed to be where Hinduism arise.

i beleive a. is the only possible answer

the answer is b. hope this !