This question has one or more than one a...

This question has one or more than one answer is correct. Write all possible answers.
The relaion `R={(1,1)(2,3)(3,4),(4,2)}` on the set `X={1,2,3,4}`
1) is not a function for `X to X`
2) is a one-to-one function from `X to X`
3) an onto function of `X to X`
4) R is a transitive relation on `X`

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