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
A newborn baby presented with profuse bleeding from the umbilical stump after bih. Rest of the examination and PT, APTT are within normal limits. Most of probable diagnosis is: 
Select and explain. 
A. Factor X deficiency, B. Glanzmann thrombasthenia, C. von-Willebrand disease, D. Bernard-Soulier disease
A: Factor X deficiency
Answer: A: Factor X deficiency 
Explanation: Ans. a. Factor X deficiency