COPD Characteristics and Misconceptions

Steps:

• Statement 1 is false: COPD is a progressive, irreversible lung disease caused by airflow limitation.
• Statement 2 is true: Symptoms like dyspnea and cough are chronic and typically stable without acute fluctuations.
• Statement 3 is true: Chronic bronchitis in COPD involves persistent cough with excess mucus production.
• Statement 4 is true: COPD usually develops after age 40, linked to long-term smoking exposure.

Why D is correct:

• D selects 2, 3, and 4, aligning with COPD's definition as a non-reversible condition with persistent symptoms, productive cough, and onset in adults over 30.

Why the others are wrong:

• A includes false statement 1 on reversibility.
• B includes false statement 1 on reversibility.
• C omits true statements 2 and 3 on symptom stability and cough.

Final answer: D