Insp. Rajni is suppose to help Bindu so i dunt think she is dead.... she must have faked it or maybe she went unconciuos and thinking shes dead Karan left....or maybe he put her in that room by that girl... who knows...
I hope whoever says that Bandini is not dead is correct. Besides according to the story insp.Rajni was supposed to help Bandini so she can't be dead unless there is a change in the story.