The open-loop transfer function of a unity feedback system is $G(s)=\frac{K}{s\left(s^{2}+s+2\right)(s+3)}$
The range of $\mathrm{K}$ for which the system is stable is
- $\frac{21}{44}>\mathrm{K}>0$
- $13>\mathrm{K}>0$
- $\frac{21}{4}<\mathrm{K}<\infty$
- $-6<\mathrm{K}<\infty$