Reasons
1) rani sa nd raja sir are childless.
2) rani sa has not come Infront of Rudra till now.. Neither wedding nor after that.
3) she loves paro as her own, so it's rudra vs paro, rudra vs his mother.. But ranisa nd paro together.
4) nd my detective mind... After seeing hundreds of serials and movies says tat the culprit and the victim are both known and shown from beginning 😳
5) rani sa asks about the brave bsd officers name...nd doesn't get d ans!