A linear pair is the angles that lie on a straight line
Line RU ⇒ the angles that make 180° angles are
∠RST and ∠UST
∠RSV and ∠USV
Line VT ⇒ the angles that make 180° angles are
∠VSU and ∠TSU
∠VSR and ∠TSR
The correct answers from the option are:
RST and RSV
RST and TSU
TSU and USV