How many main styles of Chhau folk dance exist?

Correct option is B

The correct answer is (b) 3.
 There are three main styles of Chhau folk dance.
 These styles are named after the regions they originate from: Seraikella Chhau (Jharkhand), Mayurbhanj Chhau (Odisha), and Purulia Chhau (West Bengal).
 Each style has its distinct characteristics and variations in techniques, costumes, and themes.