56. Which of the following is an acute disorder affecting the lungs?

Answer: B

Explanation:

Asthma is an acute disorder affecting the lungs.

Asthma is characterized by sudden and severe episodes of breathing difficulty due to inflammation and narrowing of the airways, making it a clear example of an acute lung disorder.

A) Anaphylactic reaction

Anaphylactic reactions can lead to respiratory distress but are primarily systemic allergic responses that may involve the lungs. However, they are not classified as a lung disorder per se, as they affect multiple organ systems simultaneously.

B) Asthma

Asthma specifically involves the lungs and is marked by acute episodes of airway constriction, making it the correct choice. It can cause sudden wheezing, coughing, and shortness of breath, directly impacting respiratory function.

C) Hay fever

Hay fever, or allergic rhinitis, primarily affects the nasal passages and sinuses rather than the lungs. While it can lead to respiratory symptoms, it does not involve acute lung disorders directly and is thus not the correct option.

D) Emphysema

Emphysema is a chronic lung condition characterized by long-term damage to the alveoli and is not considered an acute disorder. It leads to progressive breathing difficulties over time rather than sudden episodes, making it an inappropriate choice for this question.

Conclusion

Asthma stands out as the only option that represents an acute lung disorder, characterized by sudden episodes of airway narrowing. In contrast, the other options either describe systemic responses, chronic conditions, or affect different areas of the respiratory system, failing to meet the criteria specified in the question.