The correct answer is B. Jharkhand.
After the reorganization of Bihar in 2000, the new state of Jharkhand was created out of the southern and eastern parts of Bihar. Jharkhand is a tribal-majority state, with over 26% of its population belonging to Scheduled Tribes. The state is home to a number of tribal groups, including the Santhals, Mundas, Oraons, Ho, and Kharia.
The tribal areas of Bihar were largely neglected by the state government. The people of these areas faced a number of problems, including poverty, illiteracy, and lack of access to basic amenities. The creation of Jharkhand was seen as a way to address these problems and to give the tribal people a greater say in their own affairs.
The state of Jharkhand has made some progress in addressing the problems of its tribal people. However, there are still a number of challenges that need to be addressed. These include poverty, illiteracy, lack of access to basic amenities, and discrimination. The state government needs to do more to improve the lives of the tribal people of Jharkhand.
The other options are incorrect because they are not tribal-majority states. Chhattisgarh is a tribal-majority state, but it was not created out of the southern and eastern parts of Bihar. Madhya Pradesh is not a tribal-majority state. Uttarakhand is not a tribal-majority state.