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If ` alpha , beta ` are the roots of ` x^2 + px +1=0` and ` gamma , delta ` are the roots of ` x^2 +qx +1=0` then `(alpha - gamma )(beta - gamma)(alpha + delta )( beta + delta )=`

A

`q^(2)-p^(2)`

B

`p^(2)-q^(2)`

C

`p^(2)+q^(2)`

D

`p^(2)q^(2)`

Text Solution

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The correct Answer is:
A
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