किफायती लागत पर आधुनिक सुविधाओं के साथ पूरी तरह से वातानुकूलित (AC) 3-टियर यात्रा प्रदान करने के लिए भारतीय रेलवे द्वारा कौन सी ट्रेन शुरू की गई थी?

Which train covers the longest distance route on the Indian Railways network?

What is the standard track gauge used for Broad Gauge (BG) tracks in Indian Railways?

Match the following railway zones with their correct headquarters: Railway ZoneHeadquartersA. Northern Railway1. KolkataB. Western Railway2. MumbaiC. Eastern Railway3. New DelhiD. Southern Railway4. Chennai