Final answer:
The pulmonic valve leadlet most commonly recorded by M-mode is the Right.
Step-by-step explanation:
The pulmonic valve, also known as the pulmonary valve, is the right semilunar valve located at the opening between the right ventricle and the pulmonary trunk. It is the valve that controls the flow of blood from the right ventricle into the pulmonary artery, which carries blood to the lungs.
The correct answer to the question is D. Right because the pulmonic valve is most commonly recorded by M-mode in the right leadlet.