Heart Dub sound originated from

The correct answer is closure of S.L.V.

Explanation:

• The heart produces characteristic sounds, commonly referred to as the "lub-dub" sounds, which are crucial for diagnosing heart conditions.
• The "lub" sound, known as the first heart sound (S1), is produced by the closure of the atrioventricular (AV) valves, which include the mitral and tricuspid valves.
• The "dub" sound, known as the second heart sound (S2), is produced by the closure of the semilunar valves (SLV), which include the aortic and pulmonary valves.