Step 1: Understanding the events related to SAARC.
- Event (A): The SAARC Energy Centre was created through the Dhaka Declaration in 2006, marking a major step towards regional energy cooperation.
- Event (B): The Interim unit of the SAARC Disaster Management Unit was established in Gandhinagar, India, in 2006 to provide disaster relief.
- Event (C): Ambassador Mr. Md. Golam Sarwar of Bangladesh assumed office of Secretary General of SAARC in 200(C)
- Event (D): The first meeting of SAARC Inter-Governmental Expert Group on Poverty Alleviation and Sustainable Development Goals was held in Colombo in 2005.
Step 2: Chronological order of events.
- The sequence of events begins with the establishment of the disaster management unit (B), followed by the first meeting on sustainable development (D).
- After that, the Secretary General of SAARC assumed office (C), and finally, the creation of the SAARC Energy Centre (A).
Step 3: Conclusion.
Thus, the correct chronological order is (B, D, C, A). The correct answer is (A).