The correct option is Anaimudi.
Explanation
The Peninsular Plateau constitutes one of the oldest landmasses on the earth’s surface. The general elevation of the plateau varies from west to east, with the Western Ghats forming the highest continuous mountain range in the region.
- Anaimudi: Located in the Anaimalai Hills of the Western Ghats in the Idukki district of Kerala, Anaimudi stands at an elevation of approximately 2,695 meters. It is the highest peak of the Peninsular Plateau, the Western Ghats, and South India.
- Dodabetta: Situated in the Nilgiri Hills (where the Western and Eastern Ghats meet), Dodabetta has an elevation of approximately 2,637 meters. It is the second-highest peak in South India but is lower than Anaimudi.
- Mahendragiri: Located in the Gajapati district of Odisha, Mahendragiri (1,501 meters) is a significant peak in the Eastern Ghats. However, it is much lower than the peaks in the Western Ghats. Note that Jindhagada Peak is often cited as the highest peak in the Eastern Ghats.
- Kalsubai: With an elevation of approximately 1,646 meters, Kalsubai is the highest peak in Maharashtra (Western Ghats). While prominent in the northern Sahyadris, it does not rival the heights of the southern peaks.
Key Takeaway: Anaimudi (2,695 m) is the highest peak of the Peninsular Plateau and South India. It is located in the Anaimalai Hills, south of the Palghat Gap.