The correct option is C Border conflicts led to a war between India and China on 20 Oct, 1962, popularly known as the Sino-India war.
India gained independence in 1947, and the China Communist Party came into power in 1949.
To improve India’s relations with China, the five principles of coexistence- Panchsheel- was signed in 1954. Panchsheel was the foundation for peace and prosperity.
China has been claiming that Arunachal Pradesh belongs to them. Border conflicts led to a war between India and China on 20 Oct 1962, popularly known as Sino-India war. The relationship between the two nations has remained bitter and inactive post this war.