Consider a system shown in the figure. Let X(f ) and Y(f ) denote the Fourier transforms of x(t) and y(t) respectively. The ideal HPF has the cut-off frequency 10 KHz.

The positive frequencies where Y(f ) has spectral peaks are

A

1 KHz and 24 KHz

B

2 KHz and 24 KHz

C

1 KHz and 14 KHz

D

2 KHz and 14 KHz