Problems on writing Transfer Function 1.2

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For the given figure, C(s)/R(s) is

(a)${4(s+2) \over ((s+2)(s+1))}$

(b)${(s-3)\over ((s+2)(s+1))}$

(c)${(9s+13)\over ((s+2)(s+1))}$

(d)${1 \over ((s+2)(s+1))}$

Answer is ( b )

Concept

Type Reasoning here