Explanation:

Navratna was the title given originally to 9 Public Sector Enterprises (PSEs) identified by the Government of India in 1997 as "public sector companies that have comparative advantages", giving them greater autonomy to compete in the global market so as to "support [them] in their drive to become global giants".Engineers India Limited is a Navratna public-sector undertaking of the Government of India under the Ministry of Petroleum and Natural Gas. It was set up in 1965 to provide engineering and related technical services for petroleum refineries and other industrial projects.