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MHT CET Medical202622 April 2026Evening ShiftBiologyBreathing and Exchange of GasesActual

Which one of the following respiratory disorders is NOT caused by bacteria or viruses?

Options

  1. AChronic bronchitis
  2. BAcute bronchitis
  3. CLaryngitis
  4. DSinusitis

Correct answer

A. Chronic bronchitis

Step-by-step solution

Chronic bronchitis is a long-term inflammation of the bronchi, primarily caused by prolonged exposure to respiratory irritants such as cigarette smoke, air pollution, or occupational dust and chemicals. It is a major component of chronic obstructive pulmonary disease (COPD) and is not caused by bacterial or viral infections. In contrast, acute bronchitis, laryngitis, and sinusitis are frequently caused by viral or bacterial infections. Answer: Chronic bronchitis

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