- Assertion (A) is correct: Water transport is vital for India's international trade, facilitating significant import and export activities via maritime routes.
- Reason (R) is incorrect: Although the east coast of India features key ports such as Chennai, Kolkata, and Vishakhapatnam, the west coast possesses a greater number of ports overall, including major facilities like Mumbai, Jawaharlal Nehru Port, and Kandla.
Therefore, the correct option is (C) (A) is correct, but (R) is incorrect.