Correct Answer: Five
Explanation:
To travel from Karnataka to Mizoram by walking, the minimum number of states that need to be crossed (excluding Karnataka and Mizoram) is as follows:
- Karnataka (Origin State)
- Andhra Pradesh (or Telangana)
- Odisha
- West Bengal
- Assam
- Mizoram (Destination State)
Hence, five states (Andhra Pradesh, Odisha, West Bengal, Assam, and Mizoram) must be crossed.