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                                    Which of the following diseases is associated with smoking?A. BronchitisB. EmphysemaC. Lung cancerD. All of these | 
                            
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Answer» Correct Answer - D Bronchitis: An acute or chronic inflammation of the mucous membranes of the tracheobronchial tree. Emphysema: over-inflation and destructive changes of alveolar walls, resulting in the loss of lung elasticity and decreased gases.  | 
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