Arrange the regions of the electromagnetic spectrum in order of increasing energy per photon.

• A. Radio wave, Microwave, Infrared, Visible light, Ultraviolet, X-ray, Gamma Ray
• B. Radio wave, Microwave, Ultraviolet, Visible light, Infrared, X-ray, Gamma Ray
• C. Gamma Ray, X-ray, Ultraviolet, Visible light, Infrared, Microwave, Radio wave
• D. Gamma Ray, X-ray, Infrared, Visible light, Ultraviolet, Microwave, Radio wave

Answer: (A)