Option 1: Uttar Pradesh -> Shares border with Chhattisgarh in the north.
Option 2: Madhya Pradesh -> Shares border with Chhattisgarh in the west and northwest.
Option 3: Assam -> Located in northeast India, geographically far from Chhattisgarh with no shared border.
Option 4: Andhra Pradesh -> After Telangana's formation (2014), Chhattisgarh borders Telangana, not Andhra Pradesh.
Hence, Assam -> Chhattisgarh shares its borders with 7 states: Uttar Pradesh, Madhya Pradesh, Maharashtra, Jharkhand, Odisha, Telangana, and earlier Andhra Pradesh (before 2014 bifurcation). Assam is located in the northeastern region of India and does not share any border with Chhattisgarh -> correct