The transfer function C/ R of the system shown in the figure

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The transfer function C/ R of the system shown in the figure is—

1. G₁G₂H₂
  H₁(1 + G₁G₂H₁)
2. G₁H₂
  H₁(1 + G₁G₂H₂)
3. G₂H₂
  H₁(1 + G₁G₂H₂)
4. G₂H₁
  H₁(1 + G₁G₂H₂)

Correct Option: B

From given figure

C(s)R(s) =	1	×	H₂G₁
	H₁		H₂G₁G₂

or

T.F. =	C(s)	=	H₂G₁
	R(s)		H₁(1 + G₂G₂H₂)