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 can be used in a medical procedure called extracorporeal shock - wave lithotripsy to break down kidney stones (blockages in kidney tubes) into smaller pieces for easier passage. X - rays are used for imaging the kidneys but not for clearing blockages directly. Radio waves and visible light are not used for this purpose.

Answer:

No option is correct as the most relevant are sound waves (but no single - option with just sound waves is given). If we must choose the closest, it could be argued that sound waves are part of one option, but none of these options are entirely accurate in isolation.