Listen to Osambhober Ek online. Osambhober Ek is a Bengali language song and is sung by Rupankar, Lopamudra Mitra and Kalyan Sen Barat. Osambhober Ek, from the album Netaji Subhash Chandra Ke Mone Rekhe Gaan, was released in the year 2009. The duration of the song is 4:22. Download Bengali songs online from JioSaavn.