The four major social groups in ancient India were the Brahmins, Kshatriyas, Vaishyas, and Shudras.

The Brahmins were the priestly class in ancient India and were responsible for performing religious rituals and studying the Vedas.

The Kshatriyas were the warrior and ruling class in ancient India and were responsible for protecting the kingdom and administering justice.

The Vaishyas were the farming and trading class in ancient India and were responsible for producing food and goods.

The Shudras were the lowest social group in ancient India and were responsible for performing menial tasks such as cleaning and scavenging.

Hinduism was the primary religion practiced in ancient India and is still the dominant religion in India today.

Siddhartha Gautama, also known as the Buddha, was the founder of Buddhism.

The Four Noble Truths are the foundation of Buddhism and teach that life is suffering, suffering is caused by desire, suffering can be ended by eliminating desire, and the path to ending suffering is the Eightfold Path.

Mahavira was the founder of Jainism.

The Three Jewels of Jainism are right faith, right knowledge, and right conduct.

Taxila, Nalanda, and Vikramashila were all major cultural centers in ancient India and were renowned for their learning and scholarship.

Sanskrit was the primary language spoken in ancient India and was used for religious and literary purposes.

The Vedas, the Upanishads, the Ramayana, and the Mahabharata are all major literary works from ancient India.

Sculpture, painting, and architecture were all major forms of art in ancient India.

The Taj Mahal, the Red Fort, and the Qutub Minar are all major architectural achievements of ancient India.