The correct answer is: B. Bastar
Bastar district has the maximum percentage of the tribal population in Chhattisgarh. According to the 2011 census, the tribal population in Bastar district is 69.4%. The other districts in Chhattisgarh with a high tribal population are Dantewada (67.2%), Kanker (64.1%), Sukma (63.4%), and Bijapur (62.9%).
The tribal population in Chhattisgarh is concentrated in the southern part of the state, which is known as the Bastar region. The Bastar region is home to a number of different tribal groups, including the Gonds, the Marias, and the Murias. These tribal groups have a long history and culture, and they play an important role in the economy and society of Chhattisgarh.
The tribal population in Chhattisgarh faces a number of challenges, including poverty, illiteracy, and lack of access to healthcare and education. However, there are a number of initiatives underway to improve the lives of the tribal people in Chhattisgarh. These initiatives include the development of tribal-specific programs, the provision of scholarships and other educational opportunities, and the promotion of tribal culture and traditions.