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If y=m x+c is a tangent to (x^(2))/(a^(2...

If `y=m x+c `is a tangent to` (x^(2))/(a^(2))+(y^(2))/(b^(2))`=`1` then `b^(2)`=

A

`(a m+c)^(2)`

B

`a^(2) m^(2)+c^(2)`

C

`(a)/(m)`

D

`c^(2)-a^(2) m^(2)`

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The correct Answer is:
D
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