MCQOPTIONS
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				| 1. | 
                                    Principle of duality is defined as | 
                            
| A. | all properties are unaltered when ≤ is replaced by ≥ other than 0 and 1 element. | 
| B. | all properties are unaltered when ≤ is replaced by ≥ | 
| C. | LUB becomes GLB | 
| D. | ≤ is replaced by ≥ | 
| Answer» B. all properties are unaltered when ≤ is replaced by ≥ | |