This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Amount of blood in hea 
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: Out of 5000 mL blood in our body 12% is in the hea cavitiesWhich is nearly 600Therefore generally 500-600 mL BLOOD IN HEARef: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:543