An apparatus to capture $ECG$ signals has a filter followed by a data acquisition system. The filter best suited for this application is
- low pass with cutoff frequency $200\; Hz$
- high pass with cutoff frequency $200\; Hz$
- band pass with lower and upper cutoff frequencies $100\;Hz$ and $200\; Hz$ for its pass band
- band reject with lower and upper cutoff frequencies $1\; Hz$ and $200\; Hz$ for its stop band
