12. What is Landolfi's sign?

A. Systolic contraction and diastolic dilation of the pupil.

B. Bobbing of the head with each heartbeat (like a bird walking).

C. A rapid and forceful distension of the arterial pulse with a quick collapse.

D. The shortening of the early diastolic murmur as the aortic regurgitation becomes more severe
 

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