This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
A patient has history suggestive aspergillosis features(s) which would be seen includes 
Select and explain. 
A. Serum precipitins aspergillus, B. Elevated serum IgE, C. Peripheral eosinophllia, D. All
A: Serum precipitins aspergillus
Answer: A: Serum precipitins aspergillus 
Explanation: Aspergillus precipitin is a laboratory test performed on your blood. It's ordered when a doctor suspects that you have an infection caused by the fungus Aspergillus. The test may also be called: aspergillus fumigatus 1 precipitin level test Ref Davidson 23rd edition pg 624