Step 1: Understand the question.
We need the highest peak in the Peninsular Plateau of India.
Step 2: Identify the peak.
Anamudi, at about 2,695 metres, is the highest peak. It is in Idukki district, Kerala, within the Western Ghats.
Step 3: Why it wins.
No other Peninsular peak is taller, so Anamudi is the highest point of South India.
Step 4: Rule out others.
Doddabetta (about 2,637 m) is the Nilgiri high point but lower. Mahendragiri and Guru Shikhar are shorter still.
Step 5: Conclude.
The highest Peninsular peak is Anamudi.
Answer: Anamudi