Q: Infrasonic sounds have frequencies
(a)above 25 kHz
(b)between 20 kHz and 25 kHz
(c)below 20 Hz
(d)between 20 Hz and 20 kHz
Correct Answer: (c)
The correct answer is (a) 'above 25 kHz'. This question from the General Studies domain tests knowledge of Miscellaneous.