If alpha, beta, gamma, delta are the roo...

If `alpha, beta, gamma, delta` are the roots of the equation `x^(4)+4x^(3)-6x^(2)+7x-9=0` ,then the value of `(1+alpha^(2))(1+beta^(2))(1+gamma^(2))(1+delta^(2))` is

A

13

B

11

C

9

D

5

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The correct Answer is:

A

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