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Que. 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. R is symmetric and reflexive but not transitive
b. R is reflexive but not symmetric and not transitive
c. R is transitive but not reflexive and not symmetric
d. R is symmetric but not reflexive and not transitive
Answer:R is symmetric but not reflexive and not transitive
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