In the embryonic growing period, the production of RBC takes place in
The correct option is
B
Spleen and liver
During embryonic stages, red blood cells are produced in the liver and spleen. In young children (up to about 5 years of age), red blood cells are produced in the bone marrow of all bones. In adults, the RBCs are produced in the marrow of long bones such as the ribs, breastbone, and ilium.