Mark the correct alternative in each of the following: The least value of \( k \) which makes th...

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Mark the correct alternative in each of the following:
The least value of \( k \) which makes the roots of the equation \( x^{2}+5 x+k=0 \) imaginary is
(A) 4
(B) 5
(C) 6
(D) 7
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