Subject :IMO Class : Class 8

If *a ^{x}* =

*b*=

^{y}*c*and

^{z}*b*

^{2}=

*ac*, then

*y*equals

A

B

C

D

I kinda need help with this sum, i use the formula a^x = b^y = c^z = k, but is there any other simple way to do this particular sum? I have done sums like these before but this one is a little tricky