a, b, x are in A.P., a,b,y are in G.P. a...

`a, b, x` are in `A.P., a,b,y` are in `G.P.` and `a, b, z` are in `H.P.` then:

A

`4z(x-y)(y-z)=y(x-z)^2`

B

`z(x-y)(y-z)=y(x-z)^2`

C

`2z(x-y)(y-z) = y(x-z)^2`

D

`z(x-y) (y-z)=2y (x-z)^2`

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The correct Answer is:

A

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