The range of values of \( \lambda \) for which the circles \( x^{2}...

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The range of values of \( \lambda \) for which the circles \( x^{2}+y^{2}=4 \) and \( x^{2}+y^{2}-4 \lambda x+9=0 \) have two common tangents, is
\( \mathrm{P} \)
(a) \( \in\left[-\frac{13}{8}, \frac{13}{8}\right] \)
(b) \( \lambda\frac{13}{8} \) or \( \lambda-\frac{13}{8} \)
(c) \( 1\lambda\frac{13}{8} \)
(d) none of these
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