First Capital of India: Kolkata

First port of India: Kolkata

Nobel Laureates of India: 6 out of 7 are from Kolkata

National Poet of India: From Kolkata

National Anthem, Song of India: From Kolkata

The only inspiration for youths by whose name International Youth day is celebrated: Swami Vivekananda is from Kolkata

Largest library in India: Kolkata

Largest Museum in India: Kolkata

The city in India where trams run still as a public transport: Kolkata

India's largest cricket stadium: Eden Gardens, Kolkata

India's largest football stadium: Salt Lake stadium Kolkata ( also Asia's largest)

Largest Botanical Garden in India: Kolkata ( Shibpur Botanical Garden)

Largest zoo in India: Kolkata ( Alipore Zoo)

India's first medical college: Kolkata ( Medical college, Kolkata)

India's first University: Kolkata (Calcutta University)

India's only film director who got an Oscar:  from Kolkata ( Satyajit Ray)

First Miss Universe of India:  from Kolkata ( Susmita Sen)

Largest race course in India: Kolkata

Oldest cricket club of India: Calcutta cricket club

First city in India where Metro rail as a public transport started: Kolkata

The only city of India for which the whole bollywood industry depends when it comes for music and direction: Kolkata

Highest number of Scienctists and doctors are from which city in India: Kolkata

Largest railway station of India: In Kolkata ( Howrah)

Busiest railway station of India: Kolkata ( Sealdah)

Only riverine port of India: Kolkata Port

Only Cantilever bridge in India : Howrah Bridge (Kolkata)

Largest golf course of India: In Kolkata (Royal Calcutta Golf Club)

Largest second hand book market in India: College street ( also second in the world). Kolkata