Which of the following statement is not true

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A. Autocorrelation function and energy spectral density form a Fourier transform pair

B. Autocorrelation function of a real valued energy signal is a real valued odd function

C. The value of autocorrelation function of a power signal at the origin is equal to the average power of the signal

D. Autocorrelation function is the inverse Fourier transform of power spectral density

Answer: Option B

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