Q100 / 270 · NDA 2026 (Phase 1) · General Ability

Which one of the following valves guards the opening between the right ventricle and the pulmonary artery?

  • A
    Bicuspid valve
  • Correct answer
    B
    Semilunar valve
  • C
    Mitral valve
  • D
    Tricuspid valve

Solution

The opening between the right ventricle and the pulmonary artery is guarded by the pulmonary semilunar valve, which prevents the backflow of deoxygenated blood from the pulmonary artery into the right ventricle.

The bicuspid (or mitral) valve guards the opening between the left atrium and the left ventricle.

The tricuspid valve guards the opening between the right atrium and the right ventricle.

Answer: Semilunar valve

Hence, the correct answer is option: 'B'.

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