Multiple choice general knowledge sports Which is the only city in india formed by joining 7 islands? Cochin Mumbai Kolkatta Azhapuzzha Reveal answer Fill a bubble to check yourself B Correct answer Explanation Mumbai was originally formed by joining seven islands: Bombay, Colaba, Old Woman's Island, Mahim, Mazagaon, Parel, and Worli. Land reclamation projects in the 18th and 19th centuries connected these islands into one landmass.