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: Pathology
Monospot test is used to diagnose: 
Select and explain. 
A. Pernicious anemia, B. Sickle cell anemia, C. Infectious mononucleosis, D. Leukemia
C: Infectious mononucleosis
Answer: C: Infectious mononucleosis 
Explanation: None