Valve that guards the right auriculo-ventricular aperture is

Coronary valve

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Tricuspid valve

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Bicuspid valve

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Semilunar valve

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Solution

The correct option is D Tricuspid valve
The tricuspid valve is so called because it has 3 flaps or cusps attached to the papillary muscle in the endocardium of the heart. The tricuspid valve is present at the right atrioventricular junction. It prevents the back flow of the blood from the right ventricle to the right auricle during ventricular contraction.
So, the correct answer is option B.

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