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
Glanzmann disease is 
Select and explain. 
A. Congenital defect of platelets, B. Congenital defect of RBC, C. Defect of Neutrophils, D. Clotting factor deficiency
A: Congenital defect of platelets
Answer: A: Congenital defect of platelets 
Explanation: None