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B
Post caval and auricle
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C
Left auricle and left ventricle
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D
Right auricle and right ventricle
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Solution
The correct option is C Left auricle and left ventricle In the human heart, the opening between the right atrium and the right ventricle is guarded by a valve formed of three muscular flaps or cusps, the tricuspid valve, whereas a bicuspid or mitral valve guards the opening between the left atrium and the left ventricle.