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
Christmas disease is due to deficiency of 
Select and explain. 
A. Hagernan Factor, B. Platelets, C. Plasma thromboplastin antecedent, D. Plasma thromboplastin component
D: Plasma thromboplastin component
Answer: D: Plasma thromboplastin component 
Explanation: None