कोलकाता मेट्रो रेलवे (Kolkata Metro Railway)
The first underground metro railways in India is the Kolkata Metro Railway (कोलकाता मेट्रो रेलवे) which was introduced in 29th Dec, 2010
The first underground metro railways in India is the Kolkata Metro Railway (कोलकाता मेट्रो रेलवे) which was introduced in 29th Dec, 2010