The opening of auricles and ventricles on the right side is guarded by

  • A

    Tricuspid valve

  • B

    Bicuspid valve

  • C

    Semilunar valve

  • D

    Eustachian tube

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Definition / Explanation :

$(1)$ $AV$ valve (Tricuspid) 

$(2)$ Mitral (Bicuspid) valves