A
Only 1
B
Only 3
C
2 and 3
D
1 and 2
Correct answer: (a) Only 1
Explanation
- A
Only 1
Only 1. Periyar drains to the Arabian Sea (Kerala). Pennar and Palar go to the Bay of Bengal.
- B
Only 3
Only 3. Palar is a Coromandel / Bay river.
- C
2 and 3
2 and 3. Both are east-flowing.
- D
1 and 2
1 and 2. Pennar is east-flowing (Andhra).
Summary. Official key is (a) only 1. Among the three, only Periyar meets the Arabian Sea. Also note: Periyar — West-flowing; Idukki / Kochi side; Pennar — Nallamala; Bay at Nellore; Palar — Karnataka–TN; Bay; West-flowing Kerala — Also Bharathapuzha, Pamba.