Analyze the Question Requirements

Identify the key attributes: region is Jammu & Kashmir, participants are men, and costumes include long robes and conical caps.

$\text{Location} = J\&K, \text{Gender} = \text{Male}, \text{Attire} = \text{Conical Caps}$

Evaluate Options by Region and Tradition

Compare the provided dance forms: Chholiya and HurkaBaul are traditional to Uttarakhand. Hikat is associated with Kashmiri women, while Dumhal is specifically performed by the men of the Wattal tribe.

$\text{Dumhal} \in J\&K \text{ (Male Tradition)}$

Verify against Question Criteria

The Dumhal dance involves men performing in tall, conical caps studded with beads and shells, aligning perfectly with the prompt.

$\text{Result} = \text{Option C}$