The transfer function C/R of the block diagram given below is

1.	The transfer function C/R of the block diagram given below is
A.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>G<sub>1</sub>G<sub>2</sub></center></td></tr><tr><td style="text-align: center;">1 + H<sub>1</sub>H<sub>2</sub></td></tr></table>
B.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>G<sub>1</sub>G<sub>2</sub></center></td></tr><tr><td style="text-align: center;">G<sub>1</sub>G<sub>2</sub>(H<sub>1</sub> + H<sub>2</sub>) + 1</td></tr></table>
C.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>G<sub>1</sub>G<sub>2</sub></center></td></tr><tr><td style="text-align: center;">1 + G<sub>1</sub>G<sub>2</sub>H<sub>1</sub> + H<sub>2</sub></td></tr></table>
D.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>G<sub>1</sub>G<sub>2</sub></center></td></tr><tr><td style="text-align: center;">1 + G<sub>2</sub>H<sub>1</sub> G<sub>1</sub>H<sub>2</sub></td></tr></table>
Answer» B. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>G<sub>1</sub>G<sub>2</sub></center></td></tr><tr><td style="text-align: center;">G<sub>1</sub>G<sub>2</sub>(H<sub>1</sub> + H<sub>2</sub>) + 1</td></tr></table>

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The transfer function C/R of the block diagram given below is

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