What is the normal resting heart rate for adults and how is it measured at the radial artery?

What is the normal resting heart rate for adults and how is it measured at the radial artery?

• A. 40-60 beats per minute; locate radial pulse on the outer wrist, use two fingers, count for 60 seconds.
• B. 60-100 beats per minute; locate radial pulse on the thumb side of the inner wrist, use two or three fingers, apply gentle pressure, count for 60 seconds.
• C. 60-100 beats per minute; locate radial pulse on the thumb side of the inner wrist, use two or three fingers, apply gentle pressure, count for 30 seconds and multiply by two.
• D. 80-120 beats per minute; measure by auscultation with a stethoscope at heart.

Answer: (C)