The relation R defined on the set A={1,2...

The relation `R` defined on the set `A={1,2,3,4}` by `R= {(x,y):x^(2)+y^(2)<12}` is given by
(a) `{(1,1),(1,2),(1,3)}`
(b) `{(1,1),(1,2),(2,1)}`
(c) `{(1,1),(1,2),(2,1),(3,1),(1,3),(2,3),(3,2)}`
(d) `{(1,1),(1,2),(1,3),(3,1),(2,1),(2,2)}`

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