It was Karan who had that long conversation with Umar where he told him about not liking Teja talking to Vishal and how woh possessive hai n all that. After that he was asked in the PC and they specifically mentioned that he had talked to Umar about it and asked if he was insecure. And now accusing Teja of trying to show karan being insecure about Vishal. Teja was really taken aback when karan said that.
Ek toh karan says he doesn't expres well, but will be the first one discussing teja and her equations to different HMs. Teja never ever discusses her equations with others. And then he dares blame Teja for it.
Karan is coming across as very weak. It clearly shows he has been badly affected by the PC, whereas Teja was hounded most, but she's taking the PC really well. Now even some of the things karan is saying are actually words spoken during the PC.