If \( f: D \rightarrow R, f(x)=\frac{x^{2}+b x+c}{x^{2}+b_{1} x+c_{1}} \), where \( \alpha, \beta \) are the roots of the equation \( x^{2}+b x+c=0 \) and \( \alpha_{1}, \beta_{1} \) are the roots of \( x^{2}+b_{1} x+c_{1}=0 \). Now, answer the following questions for \( f(x) \). A combination of graphical and analytical approach may be helpful in solving these problems. (If \( \alpha_{1} \) and \( \beta_{1} \) are real then \( f(x) \) has vertical asymptote at \( \left.x=\alpha_{1}, \beta_{1}\right) \). Then,
If the equations \( x^{2}+b x+c=0 \) and \( x^{2}+b_{1} x+c_{1}=0 \) do not have real roots, then
(a) \( f^{\prime}(x)=0 \) has real and distinct roots
(b) \( f^{\prime}(x)=0 \) has real and equal roots
(c) \( f^{\prime}(x)=0 \) has imaginary roots
(d) nothing can be said
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