If \( p, q \in\{1,2,3,4\} \), the number of equations of the form \...

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If \( p, q \in\{1,2,3,4\} \), the number of equations of the form \( p x^{2}+q x+1=0 \) having real roots is
\( \mathrm{P} \)
(A) 15
(B) 9
(C) 7
(D) 8
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