Explanation:

Central Railway (abbreviated CR and ????) is one of the 18 zones of Indian Railways. Its headquarters is in Mumbai at Chhatrapati Shivaji Maharaj Terminus. It has the distinction of operating first passenger railway line in India, which opened from Mumbai to Thane on 16 April 1853. The railway zone was formed on 5 November 1951 by grouping several government-owned railways, including the Great Indian Peninsula Railway, the Scindia State Railway of the former princely state of Gwalior, Nizam State Railway, Wardha Coal State Railway and the Dholpur Railways.