Explanation:

- The Wadali Brothers are renowned for their soulful renditions of Sufi Music. They have a notable presence in the world of spiritual and devotional music.

- Carnatic Music is a classical music form from southern India, distinct from the Wadali Brothers' style.

- Chhattisgarhi Folk refers to traditional folk music from the Chhattisgarh region, not associated with the Wadali Brothers.

- Hindustani Classical Music is the classical music tradition of northern India. While the brothers are trained in this form, they are primarily known for their Sufi performances.

Correct Answer: Option 3 - Sufi Music