Which of these hindu ideas became part of buddhism? a. belief in hindu gods or deities b. the caste system c. belief in reincarnation

C. Belief in reincarnation.

Before the Buddism ideas were established, many ancient Hindues from 1500 BCE to 500 BCE believed in the idea of soul, karma and the cycle of death and rebirth, called by them "Samsara", which holds the same concept of "Reincarnation".

Nowadays, reincarnation is one of the fundamental doctrines of Buddhism (along with along with Karma, Nirvana, and Moksha). In overall, It holds that when a person dies, his or her soul is reborn or reincarnated in another body form, and such cycle only ends when the person achieves insight, realization and extinguish desires.