Ultrasonic waves are longitudinal waves of frequency greater than 20,000 Hz.
The maximum frequency of audible sound waves is 20,000 Hz.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Assertion is incorrect but Reason is correct
Correct option is B)