This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Spontaneous bleeding occurs when platelet count falls below 
Select and explain. 
A. 50,000/microL, B. 40,000/microL, C. 30,000/microL, D. 20,000/microL
D: 20,000/microL
Answer: D: 20,000/microL 
Explanation: >= 50,000/mL Minimal 20,000-50,000/mL Minor bleeding after trauma < 20,000/mL Spontaneous bleeding < 5000/mL Severe, possibly life-threatening spontaneous bleeding