This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Positron emission tomographic (PET) scanning is useful in evaluation of the following except NOT RELATED-RADIOLOGY 
Select and explain. 
A. Mycotic aoic aneurysm, B. Solitary pulmonary nodules, C. Staging lung cancer, D. Lymph node involvement by malignancy
A: Mycotic aoic aneurysm
Answer: A: Mycotic aoic aneurysm 
Explanation: .