A student reflected four points across the y-axis and recorded his work as sets of ordered pairs. Which set of ordered pairs has an error?

Original point Reflection across the y-axis
A (6, 8) (-6, 8)
B (1, 1) (-1, 1)
C (0, 3) (0, 3)
D (3, 2) (3, -2)
Set A
Set B
Set C
Set D