The number of integral values of \( \lambda \) for which \[ x^{2}+y^{2}+\lambda x+(1-\lambda) y+...

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The number of integral values of \( \lambda \) for which
\[
x^{2}+y^{2}+\lambda x+(1-\lambda) y+5=0
\]
is the equation of a circle whose radius cannot exceed 5 , is
(a) 14
(b) 18
(c) 16
(d) none of these
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