A signal with two frequency components at 6 kHz and 12 kHz, is sampled at the rate of 16 kHz and then passed through a Low Passfilter having a cut-off frequency of 16 kHz. The output signalof the filter

A

is an undistorted version of the original signal

B

contains the 6 kHz component and a spurious component of 4 kHz

C

contains only the 6 kHz components

D

contains both the componentsof the original signal and two spurious components of 4 kHz and 6 kHz