The correct answer is VSNL. VSNL or Videsh Sanchar Nigam Limited is the first Indian PSU ( Public Sector Undertaking) to be listed on the New York Stock Exchange (NYSE) in 2000. Additional InformationVSNL was sold by the government in 2002. The majority of shares were bought by the Tata Group. So, It is no longer a PSU. Stock Exchange- It is a platform where stocks and securities such as shares and equities can be sold or bought. Stock Exchanges of IndiaSr. No. Name of the Recognized Stock ExchangeRecognition Valid UptoSegments Permitted1BSE Ltd. Bombay Stock Exchange)PERMANENTa. Equityb. Equity Derivativesc. Currency Derivatives (including Interest Rate Derivatives)d. Commodity Derivativese. Debt2Calcutta Stock Exchange Ltd. PERMANENT 3India International Exchange (India INX)Dec 28, 2020a. Equity Derivatives (Equity Index Derivatives & Single Stock Derivatives)b. Commodity Derivativesc. Currency Derivativesd. Debt4Indian Commodity Exchange LimitedPERMANENTa. Commodity Derivatives5Metropolitan Stock Exchange of India Ltd. Sep 15, 2021a. Equityb. Equity Derivativesc. Currency Derivatives (including Interest Rate Futures)d. Debt6Multi Commodity Exchange of India Ltd. PERMANENTa. Commodity Derivatives7National Commodity & Derivatives Exchange Ltd. PERMANENTa. Commodity Derivatives8National Stock Exchange of India Ltd. PERMANENTa. Equityb. Equity Derivativesc. Currency Derivatives (including Interest Rate Derivatives)d. Commodity Derivativese. Debt9NSE IFSC Ltd. May 28, 2021a. Equity Derivatives (Equity Index Derivatives & Single Stock Derivatives)b. Currency Derivativesc. Commodity Derivativesd. Debt Securities (Masala Bonds)Source:-https://www. sebi. gov. in/stock-exchanges. htmlMTNL- Mahanagar Telephone Nigam Limited. BSNL- Bharat Sanchar Nigam Limited