A) liver and spleen
B) red bone marrow
C) blood plasma
D) sarcoplasm
Correct Answer: A
Solution :
The formation of erythrocyte known as erythropoiesis. In the early few weeks of embryonic stage, primitive nucleated RBCs are produced in the yolk sac but in later embryonic stage of foetus, RBCs are produced by liver and spleen while in adults RBCs are produced by bone marrow.
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