Correct Answer: (a) China
Solution:In 2005, Japan was the 2nd largest economy after the United States of America. According to the latest data (2022) of the World Bank, India is the third largest economy of the world after China and the United States on the basis of purchasing power parity (PPP $). As per the World Bank data, on the basis of GDP (nominal; current US$), the world's six largest economies in 2022 are: 1. USA, 2. China, 3. Japan, 4. Germany, 5. India, 6. UK.