Explanation:

- The Kaladan Multi-Modal Transit Transport Project is an initiative to improve connectivity between India and Myanmar.

- This project involves shipping goods from India's Kolkata to Myanmar's Sittwe port by sea, then via the Kaladan River to the Myanmar-India border, and finally overland into India's northeastern states.

- Option 1: Nepal

- Nepal is a landlocked country with no direct maritime connectivity to India through such a project.

- Option 2: Myanmar

- Correct Answer: Myanmar is directly involved in the Kaladan Project, enhancing connectivity with India.

- Option 3: Bhutan

- Bhutan is geographically closer to India's northeast but is not part of this specific project.

- Option 4: Afghanistan

- Afghanistan is not connected to India via the Kaladan project and is not a neighboring country in the southeast Asian region.