This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Indium labelled WBC scan is used to locate: 
Select and explain. 
A. Occult malignancy, B. Occult bleeding, C. Abscess, D. Aneurysm
C: Abscess
Answer: C: Abscess 
Explanation: Inflammatory process and abscess which are difficult to locate with routine scanning can be diagnosed by Radionuclied scanning. They are, 1. Technitium 99 scan 2. Gallium 67 citrate scan 3. Indium 111 scan Ref: Harrison, Edition-18, Page-163.