22.  The phase response of a passband waveform at the receiver is given by

\(\phi(f)=-2\pi\alpha(f-f_c)-2\pi\beta f_c\)

Where fc is the centre frequency, and and α β are positive constants. The actual signal propagation delay from the transmitter to receiver is

(A) \(\alpha-\beta\over \alpha+\beta\)

(B) \(\alpha\beta\over \alpha+\beta\)

(C) α

(D) β

Hint: 

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