The correct answer is Myanmar.
Manipur is a state in northeastern India. It is bordered by the Indian 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, officially the Republic of the Union of Myanmar, 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 and Bay of Bengal 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 by Myanmar to the southeast. China is a country in East Asia. It is bordered by North Korea to the northeast, Russia and Mongolia to the north, Kazakhstan and Kyrgyzstan to the northwest, Uzbekistan and Tajikistan to the west, Afghanistan to the southwest, Pakistan to the south, India to the south and southeast, 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.