Arrange the electromagnetic waves in descending order from very high energy to very low energy:
1) Gamma rays 2) X-rays 3) Radio waves
4) Ultraviolet rays 5) Infra-red rays 6) Microwaves
1-2-4-5-6-3
6-5-4-3-1-2
1-2-5-6-4-3
5-6-4-3-1-2
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