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: Physiology
Amount of blood in heart: 
Select and explain. 
A. 250-300 ml, B. 500-600 ml, C. 1-2 litre, D. 100-200 ml
B: 500-600 ml
Answer: B: 500-600 ml 
Explanation: Heart contains 12% of total blood volume; i.e. 12% of 5 Ltr = 600 ml.