In BP measurement, what is the significance of Korotkoff sounds?

• A. The first Korotkoff sound marks diastolic pressure; the disappearance marks systolic pressure.
• B. The first Korotkoff sound marks systolic pressure; the disappearance marks diastolic pressure.
• C. Korotkoff sounds indicate artery occlusion level, not blood pressure measurement.
• D. The fifth Korotkoff sound marks diastolic pressure.

Answer: (B)