A low-pass filter with a cut-off frequency of 30 Hz is cascaded with a high pass filter with a cut-off frequency of 20 Hz. The resultant system of filters will function as
(A) an all – pass filter (B) an all – stop filter (C) an band stop (band-reject) filter (D) a band – pass filter
(A) an all – pass filter (B) an all – stop filter (C) an band stop (band-reject) filter (D) a band – pass filter