The Correct Answer is D.Infrared/ INFARED has a lower frequency than visible light/
Ultraviolet part of the electromagnetic spectrum has higher frequency than the visible light.
X-ray part of the electromagnetic spectrum has higher frequency than the visible light.
gamma rays part of the electromagnetic spectrum has higher frequency than the visible light.
infrared red part of the electromagnetic spectrum has lower frequency than the visible light.
hence the correct choice is infrared
