Correct option is C
The states based on their geographical locations from west to east:
· Rajasthan (D) is in the west.
· Uttar Pradesh (C) is east of Rajasthan.
· Bihar (A) is east of Uttar Pradesh.
· Assam (E) is further east of Bihar.
· Nagaland (B) is in the far east, beyond Assam.
Correct logical order (west to east):
Rajasthan (D) → Uttar Pradesh (C) → Bihar (A) → Assam (E) → Nagaland (B)
This corresponds to option (c) D → C → A → E → B.