Which of the following countries announced an 'open door' policy and economic reforms in 1978?

China

The correct answer is Option (1) → China

The Chinese leadership took major policy decisions in the 1970s. China ended its political and economic isolation with the establishment of relations with the United States in 1972. Premier Zhou Enlai proposed the ‘four modernisations’ (agriculture, industry, science and technology and military) in 1973. By 1978, the then leader Deng Xiaoping announced the ‘open door’ policy and economic reforms in China. The policy was to generate higher productivity by investments of capital and technology from abroad.