Which statement about the brush stroke counts is true?

Which statement about the brush stroke counts is true?

• A. Nails require 30 strokes; Fingers 20; Hand 20; Arms 20
• B. Fingers require 30 strokes; Nails 20; Hand 20; Arms 20
• C. Arms require 30 strokes; Nails 20; Fingers 20; Hand 20
• D. Nails require 15 strokes; Fingers 20; Hand 20; Arms 25

Answer: (A)

The concept here is how brush stroke counts are distributed to different areas during a surgical hand scrub. Nails and the skin around them harbor more bacteria and are harder to clean, so they’re given the highest emphasis with the most strokes. The remaining areas—fingers, hands, and arms—are scrubbed but count for fewer strokes since they cover larger surfaces and are cleaned adequately with fewer, broader strokes. That’s why nails get 30 strokes, while fingers, the hands, and the arms each receive 20 strokes. The other distributions would either under-clean the nails or waste effort on areas that don’t require as many strokes, which doesn’t align with the cleaning priorities of the scrub.

The concept here is how brush stroke counts are distributed to different areas during a surgical hand scrub. Nails and the skin around them harbor more bacteria and are harder to clean, so they’re given the highest emphasis with the most strokes. The remaining areas—fingers, hands, and arms—are scrubbed but count for fewer strokes since they cover larger surfaces and are cleaned adequately with fewer, broader strokes. That’s why nails get 30 strokes, while fingers, the hands, and the arms each receive 20 strokes. The other distributions would either under-clean the nails or waste effort on areas that don’t require as many strokes, which doesn’t align with the cleaning priorities of the scrub.