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
Direct Coomb's test detects 
Select and explain. 
A. Antibodies attached to RBC surface, B. Antibodies in the serum, C. Antigens attached to RBC surface, D. Antigens in the serum
A: Antibodies attached to RBC surface
Answer: A: Antibodies attached to RBC surface 
Explanation: Ans. is 'a' i.e., Antibodies attached to RBC surface