Answer : Most probably B .
What we feel in peripheral pulse , is one weak and the one strong beat in sequence .The later is due to post VPD potentiation. Since there is a compensatory pause , ECG rate (Number of QRS complexes /mt) and pulse rate are same .
Ironically , heart rate and ECG rate are not same as VPDs impact mitral valve more than aortic valve and cause additional S 1 than S 2 making heart rate considerably more than pulse rate and logically it must be double the pulse rate . This may be difficult to appreciate by auscultation, but can be documented by phono-cardiogram or by M mode echocardiogram.
Dr.S.Venkatesan MD 