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B
Liver
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C
Kidney
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D
Lung
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Solution
The correct option is A Heart The valves of the heart needs to be articulated in an accurate position to prevent the back flow of the blood. The papillary muscles are muscles located in the ventricles of the heart. These get attached to atrioventricular valves via chordae tendinae and by their contraction prevent the inversion of these valves on systole.