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If the tangent and normal to the hyperbo...

If the tangent and normal to the hyperbola `x^(2) - y^(2) = 4` at a point cut off intercepts `a_(1)` and `a^(2)` respectively on the x-axis, and `b_(1)` and `b_(2)` respectively on the y-axis, then the value of `a_(1)a_(2) + b_(1)b_(2)` is

A

`-1`

B

0

C

4

D

1

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The correct Answer is:
B
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