Ultrasound baths are used to clean delicate electronic components. Consider the following statements:
P. Ultrasound waves produce rapid high-frequency vibrations in the liquid.
Q. These vibrations create regions of compression and rarefaction that generate tiny bubbles.
R. The bubbles collapse forcefully, knocking dirt off the surfaces.
S. Ultrasound waves have wavelengths longer than the size of the components.
Which combination of statements correctly explains the cleaning action of ultrasound?
(a) P and Q only
(b) P, Q and R only
(c) P, Q and S only
(d) P, Q, R and S