Which one of the following hills are found where the Eastern Ghats and Western Ghats meet?

The Nilgiri Hills are the junction where the Eastern Ghats meet the Western Ghats, forming a mountain ‘‘knot’’ in the southern Peninsular region; this is explicitly noted with the Eastern Ghat joining the Western Ghat in the Nilgiris [1]. By contrast, the Anaimalai and Cardamom ranges are identified as parts or local names of the Western Ghats rather than convergence points of both systems [2]. Additional sources likewise describe the Nilgiris as connecting the Western and Eastern Ghats and occupying the tri-junction area of the southern states, reinforcing that the Nilgiri Hills are the confluence point of the two Ghats [3]. Hence option 3 (Nilgiri Hills) is correct.

Sources

1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 2: Physiography > 7. The Western Ghats > p. 58
2. [2] INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 2: Structure and Physiography > The Deccan Plateau > p. 12
3. [3] https://en.wikipedia.org/wiki/Nilgiri_Mountains