India's gross domestic product (GDP) growth for the first quarter (ended June 30) of financial year 2020-21 suffered the largest quarterly slump of 23.9%. The sharp decline in GDP data is mainly due to closure of business activity during the quarter owing to nationwide lockdowns to curb the spread of the deadly coronavirus. The GDP figure stood at 3.1 percent in the January-March period (Q4) of the financial year 2019-20.