Question

which type of waves can be used to clear a blockage from small tubes in the kidneys?
o sound waves and visible light
o x - rays and radio waves
o radio waves and sound waves
o visible light and x - rays

Explanation:

Sound waves are used in a medical procedure called extracorporeal shock - wave lithotripsy to break up kidney stones in small tubes of the kidneys. X - rays are used for imaging the kidneys but not for clearing blockages. Radio waves are not used for this purpose. Visible light is also not used for clearing kidney blockages.

Answer:

C. radio waves and sound waves (Note: The correct answer should be just sound waves, but among the given options, the one with sound waves is this choice)