Consider the following statement (s) is not related with infrasonic frequency I.It refers to sound waves below the frequencies of audible sound, and nominally includes anything under 20 Hz. II.It refers to sound waves below the frequencies of audible sound, and nominally includes anything beyond 20 Hz. Which is/are correct statement (s)?

Consider the following statement (s) is not related with infrasonic fr

1.	Consider the following statement (s) is not related with infrasonic frequency I.It refers to sound waves below the frequencies of audible sound, and nominally includes anything under 20 Hz. II.It refers to sound waves below the frequencies of audible sound, and nominally includes anything beyond 20 Hz. Which is/are correct statement (s)?
A.	Only I
B.	Only II
C.	Both I & II
D.	All of the above
Answer» C. Both I & II