NEW DELHI, May 31 (Reuters) - India’s economic growth picked up to 1.6% year-on-year in the January-March quarter, official data showed on Monday, before a harsh second wave of COVID-19 hit the country last month. The read-out for the March quarter was faster than the 1.0% growth forecast of analysts in a Reuters poll and upwardly revised 0.5% growth rate for the previous quarter. (Reporting by Manoj Kumar and Aftab Ahmed; Editing by Toby Chopra) Our Standards: The Thomson Reuters Trust Principles.