The unit step response of a unity feedback system with open loop transfer function (G(s)=frac{K}{(s+1)(s+2)}) is shown

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The unit step response of a unity feedback system with open loop transfer function \(G(s)=\frac{K}{(s+1)(s+2)}\) is shown in the figure below. The value of \(K\), is

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(a) 0.5
(b) 2
(c) 4
(d) 6

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