Name any six public sector undertakings which have been declared navaratnas by the Govt. of India?
Following public sector undertakings have been declared navaratnas:
(i) Indian Oil Coproration (IOC).
(ii) Bharat Petroleum Corporation Ltd. (BPCL).
(iii) Hindustan Petroleum Corporation Ltd. (HPCL).
(iv) Oil and Natural Gas Corporation Ltd. (ONGC).
(v) Steel Authority of India (SAIL).
(vi) Indian Petrochemical Corporation Ltd. (IPCL).