The normal at P(4,2) on the curve xy = 8 meets the curve again at P2. Then the normal at P2 meets the curve in P3 and so on. Then:

a) P3 is the reflection of P in the x-axis
b) P3 is the reflection of P in the y-axis
c) P3 is the reflection of P in the origin
d) P3 is the reflection of P in the line y = x