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1. |
Let R be the relation on the set of positive integers such that aRb if and only if 'a 'and 'b' are distinct and have a common divisor other than 1. Which one of the following statements about 'R' is true? |
A. | π is symmetric and reflexive but not transitive |
B. | π is reflexive but not symmetric and not transitive |
C. | π is transitive but not reflexive and not symmetric |
D. | π is symmetric but not reflexive and not transitive |
AnswerΒ» E. | |