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Q)

If both the roots of the quadratic equation $x^2-2kx + k^2+k - 5 = 0$ are less than 5, then $k$ lies in the interval :


( A ) $(-\infty. 4)$
( B ) $(6, \infty)$
( C ) $[4, 5]$
( D ) $(5,6]$

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