Question

If the equation \(x^{2}+y^{2}-10 x+21=0\) has real roots \(x=a\) and \(y=\beta\) then
(A) \(3 \leq x \leq 7\)
(B) \(3 \leq y \leq 7\)
(C) \(-2 \leq y \leq 2\)
(D) \(-2 \leq x \leq 2\)

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