B) 4.9% Explanation: India is expected to equal China‘s 4.9% share of world GDP in 2005 by the middle of next decade and if the country grows faster, the date can be advanced. India‘s economy grew a stronger-than-expected 7.9% in the March quarter, making it the fastest growing major economy. HSBC said that if India grows at 8% rate, it would achieve the 4.9% share by 2027.