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      Question

      ‘Lubb-dupp’ sound is produced due to the action

      of
      A large intestine Correct Answer Incorrect Answer
      B lungs Correct Answer Incorrect Answer
      C heart Correct Answer Incorrect Answer
      D oesophagus Correct Answer Incorrect Answer

      Solution

      The heart produces the "lubb-dupp" sound. The "lubb" sound is due to the closing of atrioventricular (AV) valves, and the "dupp" sound is due to the closure of semilunar valves during the cardiac cycle. Information Booster:          

      1. The heartbeat is a rhythmic contraction and relaxation of the heart muscles.
      2. The sounds are diagnostic indicators of heart health.
      3. A stethoscope amplifies these sounds for clinical analysis.

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