"You are listening to the Expresso Business Update. Here is the latest news from the world of Indian and International business brought to you by The Indian Express and The Financial Express. " Union Finance minister Nirmala Sitharaman this week said states which have reverted to the old pension system (OPS) can’t withdraw the accumulated corpus from the National Pension System (NPS) as these funds belong to the employees as per the law. The minister was responding to questions relating to demand raised by the Congress governments of Chhattisgarh and Rajasthan, which have sought return of the NPS corpus, but…