CANNN ANY1 TELL ME

hey guys i was wondering in 16 feb epesode when kt tells to tulsi (bah jab us din ap ne mujhse shadi ke liye pocha ... ) there is a music in back ground and also when laksh ask kt promise me that u forget me but kt says kiya tum yeh wada mujhe se kar sakte ho .... its the same music can u guys tell me from which movie is that