120. The “lubb” sound of the heart is caused by the closure of which valves?

A. Aortic and pulmonary valves

B. Mitral and tricuspid valves

✓

C. Mitral and aortic valves

D. Tricuspid and pulmonary valves

📖 Additional Information

Aortic and pulmonary valves
Mitral and tricuspid valves
Mitral and aortic valves
Tricuspid and pulmonary valves

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