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: Microbiology
Indirect coomb’s test detects 
Select and explain. 
A. Incomplete antibody bound to RBC, B. Free antibody, C. Free agglutinable RBCs, D. None of the above
B: Free antibody
Answer: B: Free antibody 
Explanation: Direct coomb’s test detects antibodies bound to RBC.
Indirect coomb’s test detect free antibodies.