There is no country that borders all three countries.
It borders Russia and People's Republic of China.
Mongolia is a landlocked country in East and Central Asia. It borders Russia to the north and People's Republic of China to the south, east and west.
Kazakhstan is in Central Asia. It borders China, Kyrgyzstan, Russia, Turkmenistan and Uzbekistan.
Mongolia has 2 borders, Russia to the north and the people's republic of China to the south, east and west It actually has 3. Kazakhstan to the West
Mongolia
Mongolia is between Russia and China in Eurasia. It is a landlocked country situated in East and Central Asia. It borders from Russia to the north and the People's Republic of China to the south, east and west.Mongolia is located, under Russia, in Asia
The only country which borders both Russia and India is China.
It borders Russia to the north and People's Republic of China to the south, east and west
Russia.
China is the only country that borders both Russia and India.
That is Mongolia.
North Korea is bordered by China and Russia to the north.