Which folk dance is popular in Nimar region ?

Concept: Madhya Pradesh's folk dances are strongly regional -- each area (Nimar, Bundelkhand, Malwa, Baghelkhand, and the tribal belts) has its own distinct dance form tied to a specific community, season, or occasion, so a folk dance is identified by matching it to the district/region it belongs to rather than treating the whole state as one uniform tradition.

Application: The Nimar region, the Narmada valley tract covering present-day Khandwa, Khargone, Burhanpur and Barwani districts, is known for the Kathi (Kathhi) dance -- a vigorous stick dance performed by farmers, usually after the harvest season, in which dancers strike sticks together in rhythm similar to Dandiya.

Cross-check: Comparing the region/community tied to each option confirms Kathhi as the Nimar-specific dance:

• Rai is performed by the Bedni community of the Bundelkhand region.

• Pardhouni (also spelled Pardoni) is a welcome dance of the Baiga tribal community.

• Badhai is performed in the Bundelkhand region on domestic celebrations such as childbirth.

None of these three are tied to the Nimar tract, which is what distinguishes Kathhi as the answer for this question.