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If a, b and c are in AP and if the equat...

If `a, b and c` are in AP and if the equations `(b-c)x^2 + (c -a)x+(a-b)=0 and 2 (c +a)x^2+(b +c)x+(a-b)=0` have a common root, then

A

`a^(2),b^(2),c^(2)"are in A.P."`

B

`a^(2),c^(2),b^(2)"in A.P."`

C

`a^(2),c^(2),b^(2)"are in G.P."`

D

`a^(2),b^(2),c^(2)"are in H.P."`

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