The correct answer is: A. Bastar District.
The Dhankul song is a folk song that is sung in the Bastar district of Chhattisgarh, India. It is a song about the Dhankul tree, which is a sacred tree in the region. The song is sung to celebrate the harvest and to ask for the blessings of the gods.
The Dhankul tree is a large, deciduous tree that is found in the forests of Bastar. The tree is sacred to the people of Bastar, and it is believed to be the home of the gods. The tree is also used for medicinal purposes.
The Dhankul song is a beautiful and haunting song that is a part of the rich culture of Bastar. The song is a reminder of the importance of the Dhankul tree and the role that it plays in the lives of the people of Bastar.
The other options are incorrect because they are not districts in Chhattisgarh where the Dhankul song is sung.