Let $$\mathrm{A}=\{1,2,3,4,5,6,7\}$$. Then the relation $$\mathrm{R}=\{(x, y) \in \mathrm{A} \times \mathrm{A}: x+y=7\}$$ is :
JEE · Math · previous-year question
- A.reflexive but neither symmetric nor transitive
- B.transitive but neither symmetric nor reflexive
- C.symmetric but neither reflexive nor transitive
- D.an equivalence relation
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