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
During 3rd month of gestation, hematopoiesis occurs in 
Select and explain. 
A. Liver, B. Thymus, C. Spleen, D. Bone marrow
A: Liver
Answer: A: Liver 
Explanation: From 3rd month of gestation liver and spleen become main site of hematopoiesis-Hepatic phaseSpleen makes smaller contribution compared to liverRef: Medical Physiology Indu Khurana 2015 edition page No:104