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The Sino-Indian conflict affected the opposition as well. This and the growing rift between China and the Soviet Union created irreconcilable differences within the Communist Party of India (CPI). The pro-USSR faction remained within the CPI and moved towards closer ties with the Congress. The other faction was for sometime closer to China and was against any ties with the Congress. The party split in 1964 and the leaders of the latter faction formed the Communist Party of India (Marxist) (CPI-M). In the wake of the China war, many leaders of what became CPI (M) were arrested for being pro-China. The war with China alerted the Indian leadership to the volatile situation in the Northeast region. Apart from being isolated and extremely underdeveloped, this region also presented India with the challenge of national integration and political unity. The process of its reorganisation began soon after the China war. Nagaland was granted statehood; Manipur and Tripura, though Union Territories, were given the right to elect their own legislative assemblies.

When did India and China restore full diplomatic relations after a prolonged hiatus after the Indo-China war?

1976

The correct answer is Option 4 - 1976

It took more than a decade for India and China to resume normal relations. It was in 1976 that full diplomatic relations were restored between the two countries. Atal Behari Vajpayee was the first top level leader (he was then External Affairs Minister) to visit China in 1979. Later, Rajiv Gandhi became the first Prime Minister after Nehru to visit China. Since then, the emphasis is more on trade relations between the two countries.