Which of the following statements is NOT true about the second heart sound?

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It results from the shutting of the semilunar valvesIt can sometimes be heard as a split soundIt lasts longer than the first heart soundIt indicates the beginning of diastole

Explanation

The second heart sound is produced by the closure of the semilunar valves and occasionally presents as a split sound. It signals the start of diastole. However, it does not have a longer duration than the first heart sound; in fact, it is shorter.