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If a,b are roots of the equation x^2 + q...

If `a,b` are roots of the equation `x^2 + qx + 1 = 0` and `c,d `are roots of `x^2 + px + 1 = 0,` then the value of `(a-c) (b-c)(a+d) (b+d)` will be

A

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

B

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

C

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

D

none of these

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The correct Answer is:
B
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