Soman - 'North Indian' is used more or less synomyous for person from the Hindi belt. Kindly give references to this else this would be  an OR. Also Ladakhi people along with punjabis and kashmirs are not part of the hindi belt. 

Maquahuitl - Bihar is not on the westernmost area in the Magadhi belt, but the heart of the Magadhi belt. 

I would request the editors to give some reference that would justify that North India and Hindi belt are same.

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