1) Rishaab did it for the money...
2) i don't think sahil did it it;s too obvious...maybe ganga??? she has the perfect alibi...she is out of the country
3) bhoomi may have some mental disorder and she could have attempted to kill her but to save bhoomi it could have been joydeep
4)where was manthan and ansh ???
Also the guy who was hired to kill nandani..i have a feeling Tanya is the one who hired him...how can someone turn so innocent overnight??...
if anyone has some real answers rather then my crazy accusations...feel free:)