The relation $$\mathrm{R = \{ (a,b):\gcd (a,b) = 1,2a \ne b,a,b \in \mathbb{Z}\}}$$ is :
JEE · Math · previous-year question
- A.reflexive but not symmetric
- B.transitive but not reflexive
- C.symmetric but not transitive
- D.neither symmetric nor transitive
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