The correct option is B 1962
On October 20 1962, China's People's Liberation Army invaded India across McMohan line on the northeast frontier and Ladakh. A disputed Himalayan region was the main reason for the war along with other issues. Unable to reach a political solution on the disputed 3,225 km Himalayan border, China launched attack. Chinese troops had captured Rezang La in Chushul and Tawang region.