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
Spontaneous mouth petechiae and gingival bleeding occur typically at platelet levels 
Select and explain. 
A. Between 300,000 - 500,000/mm3, B. Between 20,000-30,000/mm3, C. Between 150,000-170,000/mm3, D. Between 70,000-185,000/mm3
B: Between 20,000-30,000/mm3
Answer: B: Between 20,000-30,000/mm3 
Explanation: None