The correct option is
A infrared rays
Explanation of the correct option
A:infrared rays
- Infrared (IR) light is the most common part of the electromagnetic spectrum that individuals experience in their daily lives, despite the fact that much of it passes unseen.
- Human eyes cannot see it, but people can feel it as heat.
- Every hot object emits IR radiation.
Explanation of the incorrect option
B:visible rays
- Every hot object does not emit visible rays.
C:X-rays
- Every hot object does not emit X rays.
Hence option A is correct.