Explanation:

- Agadhu Samantra was a freedom fighter from Orissa who initially served in the British-Indian Army.

- He left the British service to join the Indian National Army (INA) in 1942 due to patriotic fervor.

- He was deputed by INA as a Naik in the First Bahadur Group.

Explanation of Options:

1. Andaman-Nicobar:

- The Andaman-Nicobar Islands were strategic locations during WWII but not primarily linked with Agadhu Samantra’s specific service in INA.

2. Burma Front:

- The Burma Front was a significant theater of war involving the INA and Japanese forces against the British.

- The INA had notable deployments here as they intended to advance into India through Burma.

3. Arunachal Pradesh:

- This area was not a primary focus for INA operations compared to options like the Burma Front.

4. Assam:

- While crucial during the war, it was primarily in the context of being protected from Japanese advances rather than a deploying ground for the INA.

Given these explanations, the correct answer is:

Option 2: Burma Front