The set of points on the axis of the par...

The set of points on the axis of the parabola `y^2-4x-2y+5=0` from which all the three normals to the parabola are real , is

A

`(lamda,0),lambdagt1`

B

`(lamda,1),lamdagt3`

C

`(lamda,2),lamdagt6`

D

`(lamda,3),lamdagt8`

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The correct Answer is:

B

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