The correct answer is (b), Muhammad Yunus.
Muhammad Yunus is a Bangladeshi economist and social entrepreneur who is the founder of the Grameen Bank, which provides microcredit to poor people in Bangladesh. He is also the co-founder of the Yunus Centre, a think tank that works on issues related to poverty alleviation and social development.
Yunus was awarded the Nobel Peace Prize in 2006 for his work on microcredit. He was the first Bangladeshi to win the Nobel Prize, and he is the only person to have won the Nobel Peace Prize for his work on economic development.
The other options are incorrect.
(a) M Gore is an American politician who served as the 45th Vice President of the United States from 1993 to 2001. He is also a former Senator from Tennessee and a professor at Columbia University.
(c) Martti Ahtisaari is a Finnish diplomat who served as the President of Finland from 1994 to 2000. He is also a former United Nations Special Representative for Kosovo and a Nobel Peace Prize laureate.
(d) Wangari Maathai was a Kenyan environmental and political activist who was the first African woman to win the Nobel Peace Prize. She is best known for her work on planting trees and promoting environmental conservation.