This old man in the video below is the guy who caught the IAF Wing Commander Abhi after he came down. He says that he saw 3 parachutes come down. I cannot make out what he is saying though due to accent. At 00:50, he says and mentions where the 3 pilots went according to him. He says one went over the border to the other side, one came down our side and one... (don't know what he says here).
This means that the 2nd aircraft was not a Mig-21, Imran Khan had mentioned two Migs, the only other two seater Mig is the Mig-29, so the JF-17 Thunder not only scored a Mig-21 kill but also a Mig-29 kill!