Yes, Nandana Sen's bosoms are exposed. It was in a scene from Ketan Mehta's coming film Rang Rasiya.
For people who are already on the edge of their seat after reading this can calm down and get back to their seats because the censor board has already cut the scene saying it to be too revealing and eye-catchy for the Indian audience.
While scrutinizing the film Rang Rasiya, the censor board saw that in a particular scene Nandana Sen's breasts were clearly visible. Immediately after seeing that scene the censor board sent a notice to Ketan Mehta.
Ketan Mehta did confirm the news but said that the scene is very long and if cut by the censor board they will have to re-do it all over again.
Rang Rasiya stars Randeep Hooda and Nandana Sen as leads and is already certified as an 'A' Grade film.