Read the following statements.

Statement I : Emphysema is a chronic disorder in which both the lungs shrink in size.
Statement II : Emphysema is caused due to chronic cigarette smoking.

In light of given statements, choose the correct answer from the options given below.

Statement I is incorrect. Emphysema does not cause the size of the lungs to shrink; rather, it leads to the destruction of alveoli, which results in enlarged air spaces and decreased lung function.

Statement II is true. Chronic cigarette smoking is a major cause of emphysema, as it damages the lung tissue over time.