The largest Scheduled Tribe in Tamil Nadu is the:

Todas
Irulas
Paniyas
Kurumbas

The correct answer is: a) Todas

The Todas are a tribal people of the Nilgiri Hills in the Indian state of Tamil Nadu. They are one of the most isolated and least-studied tribal groups in India. The Todas are a pastoral people who herd buffalo. They are also known for their unique culture and traditions.

The Irulas are a tribal people of the Western Ghats in the Indian state of Tamil Nadu. They are a forest-dwelling people who are known for their traditional knowledge of medicinal plants. The Irulas are also known for their unique culture and traditions.

The Paniyas are a tribal people of the Eastern Ghats in the Indian state of Tamil Nadu. They are a nomadic people who are known for their traditional knowledge of herbal medicine. The Paniyas are also known for their unique culture and traditions.

The Kurumbas are a tribal people of the Western Ghats in the Indian state of Tamil Nadu. They are a forest-dwelling people who are known for their traditional knowledge of medicinal plants. The Kurumbas are also known for their unique culture and traditions.

The Todas are the largest Scheduled Tribe in Tamil Nadu. They are a pastoral people who herd buffalo. They are also known for their unique culture and traditions. The Todas are a very isolated people and have very little contact with the outside world. They are a very proud people and are very protective of their culture and traditions.