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If R1 and R2 are two non-empty relations...

If `R_1` and `R_2` are two non-empty relations in a set A. Which of the following is not true?
(1) If `R_1` and `R_2` are transitive, then `R_1uuR_2` is transitive
(2) If `R_1` and `R_2` are transitive, then `R_1nnR_2` is transitive
(3) If `R_1` and `R_2` are symmetric, then `R_1uuR_2` is symmetric
(4) If `R_1` and `R_2` are reflexive, then `R_1nnR_2` is reflexive

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