Classify the states into five groups each having common frontiers with Pakistan, China, Myanmar, Bangladesh and Nepal.
- Pakistan: Jammu and Kashmir, Punjab, Rajasthan and Gujarat.
- China: Jammu and Kashmir, Himachal Pradesh, Sikkim and Arunachal Pradesh.
- Myanmar: Arunachal Pradesh, Nagaland, Manipur, Mizoram.
- Bangladesh: Bihar, West Bengal, Jharkhand, Assam, Meghalaya and Tripura.
- Nepal: Uttarakhand, U.P., Bihar, West Bengal and Sikkim.