The correct option is B Tricuspid valve
The tricuspid valve is found on the right side of the heart. It has three flaps that open and close, allowing blood to flow from the right atrium to the right ventricle in the heart.
The bicuspid valve permits blood to flow one way only, from the left atrium into the left ventricle. It is also called the mitral valve.
The semilunar valves are located between the ventricles of the heart and the blood vessels that these ventricles pump blood into. They prevent blood pumped out of the heart from returning back into the heart.