Arrange the following electromagnetic radiations in decreasing order of their frequencies.1.Gamma rays2.Ultraviolet rays3.Radio waves4.X-raysSelect the correct answer from the code given below:

1. A

   1, 4, 3, 2

   1, 4, 3, 2. Puts radio before ultraviolet.

2. B

   4, 1, 2, 3

   4, 1, 2, 3. Starts with X-rays; gamma is higher frequency.

3. C

   1, 4, 2, 3

   1, 4, 2, 3. Gamma → X-rays → ultraviolet → radio (decreasing frequency).

4. D

   4, 1, 3, 2

   4, 1, 3, 2. X-rays first; radio before UV.

Summary. Official key is (c) 1, 4, 2, 3. Gamma, X-rays, UV, radio. Also note: c = fλ — Higher f, shorter λ; Gamma — Highest f in this set; Radio — Lowest f; Visible — Between UV and IR; not listed.