Hey!
____________________________
Given-:
∆RQT
QS bisects ∠RQT
∠R= ∠T
To prove- RS=TS
Proof-
∠R= ∠T [Given]
∠RQS= ∠TQS [ QS bisects ∠RQT]
RQ= QT [∠R= ∠T]
Here we get, ∆RSQ ≅ ∆TSQ
Thus, By C.P.C.T, we get,
RS=TS
Thus, correct Option=> (B)
____________________________
Hope it helps...!!!