 
			 
			MCQOPTIONS
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				| 1. | Consider the block diagram shown below: If the transfer function of the system is given by T(s)=G1G2+G2G3/1+X. Then X is: | 
| A. | G2G3G4 | 
| B. | G2G4 | 
| C. | G1G2G4 | 
| D. | G3G4 | 
| Answer» C. G1G2G4 | |