<prompt> A 35-year-old woman is admitted to the hospital with a complaint of shortness of breath. During physical examination it is noted that there is wide splitting in her S2 heart sound. Which of the following valves isare responsible for production of the S2 heart sound?Mitral valvePulmonary and aorticAortic and mitralTricuspid  <response>: The S2 heart sound refers to the second dub heart sound. This sound is produced by the closure of the aortic and pulmonary semilunar valves. The closure of mitralbicuspid and tricuspid valves produce the first S1 lub heart sound. 