The correct answer is option B) Tanzania.

India and Tanzania have decided to set up a task force to prepare a five-year roadmap to boost bilateral defence cooperation. This decision was announced during the 11th session of the India-Tanzania Joint Commission on Trade, Economic, Scientific, and Technical Cooperation held in New Delhi.

Explanation:

1. India-Tanzania Joint Commission Meeting:
- The India-Tanzania Joint Commission on Trade, Economic, Scientific, and Technical Cooperation is a platform for both countries to discuss and enhance their bilateral relations in various fields.
- During the 11th session of this commission, held in New Delhi, both countries discussed several areas of mutual interest, including defense cooperation.

2. Task Force for Bilateral Defence Cooperation:
- As part of their discussions, India and Tanzania decided to establish a task force that will prepare a five-year roadmap to enhance their defense cooperation.
- The task force will work towards identifying areas of cooperation, including joint exercises, training, capacity building, and defense equipment procurement.

3. Significance of Bilateral Defence Cooperation:
- Bilateral defense cooperation plays a crucial role in strengthening the strategic partnership between two countries.
- It helps in enhancing mutual trust, sharing best practices, and promoting regional security and stability.
- Defense cooperation also facilitates technology transfer, joint research and development, and defense industrial collaboration.

4. India-Tanzania Defense Cooperation:
- India and Tanzania have been engaging in defense cooperation for several years.
- India has provided training and capacity building support to Tanzanian defense forces.
- The two countries have also conducted joint military exercises, exchange visits, and held regular defense dialogue.
- The establishment of a task force and the five-year roadmap will further strengthen their defense cooperation and open avenues for increased collaboration in the future.

In conclusion, India and Tanzania have decided to set up a task force to prepare a five-year roadmap to boost bilateral defense cooperation. This decision was taken during the 11th session of the India-Tanzania Joint Commission on Trade, Economic, Scientific, and Technical Cooperation held in New Delhi. The task force will identify areas of cooperation, including joint exercises, training, capacity building, and defense equipment procurement. This move will further enhance the strategic partnership between the two countries and promote regional security and stability.