Now why didn't he took the suitable course of action instead of slapping and locking Gayetri away and giving key to BRM?
He was being an emotional fool, BRM manipulated him saying I'm sauteli, I'm not loved, so he entrusted her his most precious thing "Gayatri"!! to prove her that he trusts her and that she will take good care of Gayatri just the way she took good care of him, little does he know that it was a bad move obviously, a decision which wasn't taken from mind!!!
The normal thing would have been him personally taking care of Gayatri, calling a psychiatrist, bringing someone that Gayatri trusts and loves and gets well along with : Swarna for example!
and how her real family (Seths) are always kept in darkness, they never know what happens with their daughter!!! (maybe he doesn't want to bother them but still when things are serious, the family should know, it's their right:)
Another point, if he thinks Gayatri wants to hurt BRM, why send the latter to her!!! for both the ladies he should not have taken this decision
Anyways Ranaji's brain is overpowered by his emotions!! it has always been the case most of the time! it's been a long time since we have seen an intelligent move from his part, last was kidnapping Chacha to know the truth about Gayatri's accident, and I liked him in the first episodes when he solved the water tax problem and when he wasn't fooled by Kunwar Chacha, I wish we can see more of that!