In early 2010, UN Secretary General Ban Ki-moon set up a High Level Advisory Group on Climate Change Financing. The group's task was to study how the 100 billion dollar a year fund promised at the Copenhagen climate summit could be raised and mobilized by 2020.
Montek Singh Ahluwalia, who was then the Deputy Chairman of the Planning Commission of India, was named as one of the 19 members of this advisory group on March 5, 2010. His inclusion reflected India's role in global climate negotiations and its stake in how climate finance would be structured for developing countries.
Shyam Saran, Chandrashekhar Dasgupta, and Pradipto Ghosh were all figures connected to India's climate policy and negotiations at various points, but it was Montek Singh Ahluwalia who was picked for this particular UN advisory group on financing.
The correct answer is option 2, Montek Singh Ahluwalia.