Which is the correct way to record pulse data

Using the first and second fingertips, press firmly but gently on the arteries until you feel a pulse. Start counting the pulse when the clock's second hand is on the 12. Count your pulse for 60 seconds (or for 15 seconds and then multiply by 4 to calculate beats per minute).

Explanation:

Using the first and second fingertips, press firmly but gently on the arteries until you feel a pulse.

Start counting the pulse when the clock's second hand is on the 12.

Count your pulse for 60 seconds (or for 15 seconds and then multiply by 4 to calculate beats per minute).

When counting, don't watch the clock continuously, but concentrate on the beats of the pulse.

If unsure about your results, ask another person to count for you.

Explanation:

When taking your pulse: Using the first and second fingertips, press firmly but gently on the arteries until you feel a pulse. Start counting the pulse when the clock's second hand is on the 12. Count your pulse for 60 seconds (or for 15 seconds and then multiply by 4 to calculate beats per minute).

which of what? i am confused