Explanation:

- Option 1: Pacific Ocean

- The Pacific Ocean is located to the east of Asia and Australia and the west of the Americas. It's the largest and deepest ocean but is not directly south of India.

- Option 2: Arabian Sea

- The Arabian Sea lies to the west of India. It borders India’s western coastline but is not directly south.

- Option 3: Bay of Bengal

- The Bay of Bengal is to the east of India. It is part of the northeastern Indian Ocean bordered by India and several other countries.

- Option 4: Indian Ocean

- The Indian Ocean is directly south of India. It is the third-largest ocean and plays a significant role in trade and climate for the region.