Explanation
Why Correct: The Rohingya are an ethnic group primarily from the Rakhine State (formerly Arakan) in western Myanmar.
Distractor Analysis: Kachin and Chin are other ethnic minority states in northern and western Myanmar respectively, but are not the ancestral home of the Rohingyas.
Takeaway: The Rohingya conflict is centred in Rakhine State; the Rohingya language is related to Bengali, and they are predominantly Muslim.