Question

Assertion (A)- The people of France stormed the Fortress prison of Bastille Reason (R) They were hopeful to find the commander of the Bastille prison in there (1) Choose the most appropriate option given below a)Both A and R is true and R is the correct explanation of A b)Both A and R is true but R is not the correct explanation of A c) A is correct ,but R is incorrect d) A is incorrect R is correct​

Answer 1

Answer:

Ultrasonic wave is defined as “inaudible sound with high frequency for human” the frequency of which generally exceeds 20 kHz. These days, sound wave which is not intended to be heard is also called ultrasonic wave.