MPSC PYQSciencemarathi
Choose the right answer: (a) Human being can listen the sound of frequency 20 to 20000 Hz. (b) Infrasonic waves have frequency more than 20000 Hz. (c) Ultrasonic waves have frequency less than 20 Hz. (d) Sound waves can't travel through solids.
A.Only (d) sentence is correct.
B.Only (c) and (d) sentence is correct.
C.All sentences are correct.
D.Only (a) sentence is correct.
Correct answer: D