Which of the following statements are correct?1. A lowpass filter passes low frequencies and stops high frequencies.2. A highpass filter passes high frequencies and rejects low frequencies3. A bandpass filter passes frequencies within a frequency band and attenuates frequencies outside the band.4. A bandstop filter passes frequencies within the band and blocks/attenuates frequencies outside a frequency band.

• A. 1, 2 and 4 only
• B. 1, 3 and 4 only
• C. 2, 3 and 4 only
• D. 1, 2 and 3 only