The Tana Bhagat movement was a tribal movement in the early 20th century, primarily in the region of:

The Tana Bhagat movement was a tribal movement in the early 20th century, primarily in the region of Dang. The movement was led by Bhagu Vanara, who preached a message of equality and social justice. The Tana Bhagats rejected the traditional Hindu caste system and practices, and they also opposed British rule. The movement was successful in achieving some of its goals, including the introduction of education and healthcare to the tribal communities.

The other options are incorrect because they are not the regions where the Tana Bhagat movement was primarily concentrated. Panchmahal is a district in Gujarat, Chhota Udaipur is a district in Rajasthan, and Banaskantha is a district in Gujarat.