 
			 
			MCQOPTIONS
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				| 1. | Signal flow graphs: | 
| A. | They apply to linear systems | 
| B. | The equation obtained may or may not be in the form of cause or effect | 
| C. | Arrows are not important in the graph | 
| D. | They cannot be converted back to block diagram | 
| Answer» B. The equation obtained may or may not be in the form of cause or effect | |