Triangles have a property that the side opposite to the larger angle is larger

Angle opposite XY = Z = 180 - 148 = 32

Angle opposite YZ = X = 34

32 < 34

Z < X

XY < YZ

Ans. B

There is a triangle property that *the length opposite to the larger angle is larger*. Simply find the angle at the vertex Z and proceed to compare the lengths using the angles