The government on Friday conferred Bharat Ratna on former Prime Ministers Chaudhary Charan Singh and PV Narasimha Rao and agricultural scientist MS Swaminathan, who is known for his leading role in India's 'Green Revolution', posthumously.
Earlier, the government had announced Bharat Ratna, the highest civilian award in the country, for veteran BJP politician LK Advani and socialist icon and former Bihar Chief Minister Karpoori Thakur.