Answer: 4
Notes: There are four bridges on the Hooghly River connecting Kolkata with Howrah district: Vivekananda Setu built in 1930, (road-cum-rail bridge) – the first to be commissioned, and which had become old and needed repairs; Howrah Bridge, a cantilever bridge commissioned in 1943, now renamed as Rabindra Setu (since 1965 in honour of the Noble Laurette Rabindranath Tagore); and Nivedita Setu (named after Sister Nivedita), also known as the Second Vivekananda Setu, which is 50 metres (160 ft) downstream of the old Vivekananda Setu and was commissioned on 4 June 2007.
