Answer:
(3) 49
Step-by-step explanation:
The circle diagram is attached below. angle mVS = 146°
and  angle mST =  64°.
mWT = 360 -64 - 146 = 150 (angle at a point)
∠VWS = 73° = mVS / 2
MVW = 180 - 146 = 34 (angle in a straight line)
MVW = 180 -73 - 34 = 73° (angle in a triangle)
∠TMR = 180 - 64 = 116° (angle on a straight line)
∠VMT = 116 + 34 = 150°
∠MVT = ∠MTV (base angles of an isosceles triangle)
150 +2∠mTV = 180
∠MTV = 15°
∠RVW = 73 - 15 = 58°
∠RVW + ∠VWS  + ∠VRW = 180
∠VRW  = 180 - 58 - 73 = 49
