The correct answer is China (Tibet).
Arunachal Pradesh is a state in northeastern India. It is bordered by Bhutan to the west, China (Tibet) to the north, Myanmar to the east, and Assam, Nagaland, and Manipur to the south.
Nepal is a landlocked country in South Asia. It is bordered by China to the north and India to the south, east, and west.
Bhutan is a landlocked country in South Asia. It is bordered by China to the north and India to the south, east, and west.
Myanmar (also known as Burma) is a country in Southeast Asia. It is bordered by China to the north, Laos to the northeast, Thailand to the east, Bangladesh to the west, India to the northwest, and the Andaman Sea and the Bay of Bengal to the south.