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If a,b,c,d and p are distinct non -zero ...

If a,b,c,d and p are distinct non -zero real numbers such that `:`
`( a^(2) + b^(2) +c^(2))p^(2) - 2 ( ab + bc + cd) p + ( b^(2) + c^(2) + d^(2)) le 0`, then a,b,c,d `:`

A

`A.P`

B

`G . P`

C

`H.P`

D

`a d=c d`

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The correct Answer is:
B
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