Explanation
Why Correct: Dogras are an ethnic group native to the Jammu region, inhabiting areas from the southern slopes of the Pir Panjal range down to the Punjab plains, including districts like Jammu, Kathua, and Udhampur.
Distractor Analysis: Kashmir Valley is predominantly inhabited by Kashmiri Muslims. Northern Kashmir plains refer to areas like Baramulla and Kupwara, which have Kashmiri and Gujjar populations. Poonch has a mixed population including Gujjars, Paharis, and some Dogras, but is not their primary region.
Takeaway: Dogras historically established the Dogra dynasty that ruled Jammu and Kashmir until 1947, with Maharaja Gulab Singh founding the princely state.