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The unit step response of an under-damped second order system has steady state value of $-2$. Which one of the following transfer functions has these properties ?

  1. $\frac{-2.24}{s^{2}+2.59 s+1.12}$
  2. $\frac{-3.82}{s^{2}+1.91 s+1.91}$
  3. $\frac{-2.24}{s^{2}-2.59 s+1.12}$
  4. $\frac{-3.82}{s^{2}-1.91 s+1.91}$
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