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B
Ventricles
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C
Pinna
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D
Eyes
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Solution
The correct option is C Ventricles The papillary muscles are the involuntary muscles which are present in the ventricles of the mammalian heart. They support the tricuspid valves and mitral valves. The contraction of the papillary muscles opens these valves and when the papillary muscles relax, the valves get closed. Chordae tendineae connects the papillary muscles to the valves.