18th February 2024

A 24-year-old female had a chest X-ray for an ongoing dry cough and shortness of breath

A 24-year-old female had a chest X-ray for an ongoing dry cough and shortness of breath. She also has arthralgia and fatigue. CXR shows bilateral hilar lymphadenopathy. Blood tests reveal elevated serum ACE levels.

Given the likely diagnosis in this case, which of the following hypersensitivity reactions is responsible for the pathogenesis of this condition?

Select the SINGLE most appropriate option from the list below. Select ONE option only.