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If (a, 0) is a point on a diameter of th...

If (a, 0) is a point on a diameter of the circle `x^(2)+y6(2)=4`, then the equation `x^(2)-4x-a^(2)=0` has

A

exactly one real root in `(-1,0)`

B

exactly one rela root in `[2,5]`

C

distinct roots greater than `-1`

D

distinct roots less than 5

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The correct Answer is:
A, B, C, D
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