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. 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
AnswerΒ» E.


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