Indian Politics
The correct chronological order of the formation of Haryana, Sikkim, Arunanchal Pradesh and Nagaland as full states of Indian Union is

Nagaland-Arunachal Pradesh- Haryana-Sikkim C
Nagaland-Haryana-Sikkim-Arunachal Pradesh
Nagaland-Haryana-Arunachal Pradesh-Sikkim
Haryana-Sikkim-Arunachal Pardesh-Nagaland

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