This was Anurag's side of the story
Komolika doesn't know that Prerna is alive or does she know?
Why was Anurag romancing with Komolika after pushing Prerna?
Komolika doesn't know Prerna is alive in yesterday's episode she was praying for the peace of Prerna's soul in her monologue.
Also why would Komo tell Bajaj to rescue Prerna if she died that would be good for Komo there would be no chance of her coming back.
Anurag might be thinking his divers rescued Prerna so she would come to the farmhouse to question Anurag but might back off from doing so watching Anulika together or he saw her coming in.