_________ is a form of Sikh festival.

The correct answer is Hola Mohalla.

Explanation:

Hola Mohalla, also known simply as Hola, is a major three-day Sikh festival celebrated every year in the month of March (on the day following the festival of Holi). It was established by the tenth Sikh Guru, Guru Gobind Singh Ji, at Anandpur Sahib in Punjab.

During Hola Mohalla, Sikhs gather to witness military exercises, martial arts demonstrations (Gatka), mock battles, music, and poetry competitions, celebrating bravery, community spirit, and martial traditions.

The other options listed (Kalyan, Khamaj, and Bhairav) are names of classical Indian ragas, not Sikh festivals.