This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Weil Felix reaction is based on sharing of antigens between 
Select and explain. 
A. Sheep RBC and EBV, B. Mycoplasma and human RBC, C. Rickettsia antigens and proteus antigens, D. None
C: Rickettsia antigens and proteus antigens
Answer: C: Rickettsia antigens and proteus antigens 
Explanation: Weil Felix -eg for heterophile specificity -sharing between Rickettsia and Proteus Paul Bunnell - between sheep RBC and EBV Ref: Textbook of Microbiology Baveja 5th ed Pg 95