Explanation:

Recently, Indian Railways created another record as it operated a 2.8 Km long train amalgamating four empty BOXN rakes, powered by four sets of electric locomotives. The super-long train is named 'SheshNaag', and it is the longest train ever to run on Indian Railways. This experiment of connecting 4 rakes to run on the long train named Sheshnag was successful. This allows more goods to be sent from one place to another at a time”. The incredible feat was achieved in the South East Central Railway zone of the Indian Railways. Hence option 2nd is correct.