Concept:
The South Asian Association for Regional Cooperation (SAARC) was established in 1985 to promote economic and regional integration among South Asian nations.
Explanation:
The permanent Secretariat that coordinates and monitors implementation of SAARC activities is located in Kathmandu, Nepal, and has been functioning there since 1987. Dhaka, Colombo, and New Delhi are all capitals of SAARC member states, but none of them hosts the organisation's permanent Secretariat.
Final Answer:
The SAARC Secretariat is located in Kathmandu, so option B is the answer.