<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 21-year-old primigravida woman visits the clinic in her 22nd week of gestation as part of her antenatal care. She has no complaints. Past medical history is unremarkable. Her only medication is a prenatal vitamin. Her temperature is 37.0C 98.6F, blood pressure is 11070 mm Hg, pulse rate is 78min, and respiration rate is 20min. Physical examination is consistent with the gestational age of her pregnancy with no abnormalities noted. Urine dipstick is normal. Which of the following is the current primary location for fetal myelopoiesis at this stage of development?? A: Yolk sac, B: Liver, C: Thymus, D: Aorta-gonad-mesonephros region, E: Spleen,  <response>: This is a question about fetal hematopoiesis blood cell formation during pregnancy. It provides the gestational age of the fetus 22 weeks and asks which anatomical site is the primary location for myelopoiesis formation of myeloid blood cells like red blood cells, granulocytes, monocytes at this stage of development. To answer this, we need to know the timeline of when different hematopoietic sites become active during fetal development. The choices list various hematopoietic organs.B: Liver 