Pick up the correct statement from the following:
(A) Frequency is the number of wave crests passing a fixed point in one second
(B) Frequency of a wave is measured in Hertz (Hz)
(C) Amplitude of a wave is the height of its crust from the mid-point
(D) All of these
(A) Frequency is the number of wave crests passing a fixed point in one second
(B) Frequency of a wave is measured in Hertz (Hz)
(C) Amplitude of a wave is the height of its crust from the mid-point
(D) All of these