The correct answer is Myanmar.
Manipur is a state in northeastern India. It is bordered by the states of Nagaland to the north, Assam to the east, Mizoram to the south, and Tripura to the southwest. To the west, Manipur shares an international border with Myanmar.
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 and India to the west, and the Andaman Sea to the south.
The other options are incorrect. Bangladesh is a country in South Asia. It is bordered by India to the west, north, and east, and Myanmar to the southeast. China is a country in East Asia. It is bordered by North Korea to the northeast, Russia to the north, Mongolia to the northwest, Kazakhstan to the west, Kyrgyzstan and Tajikistan to the southwest, Pakistan to the west, India to the south, Nepal to the southwest, Bhutan to the south, and Myanmar to the southwest. Nepal is a landlocked country in South Asia. It is bordered by China to the north and India to the south, east, and west.