MCQOPTIONS
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				| 1. | 
                                    In microwave system, waveguide twists | 
                            
| A. | change the plane of polarization of a propagating wave | 
| B. | change the direction of a propagating wave | 
| C. | change the mode of a propagating wave | 
| D. | both (b) and (c) | 
| Answer» B. change the direction of a propagating wave | |