<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 16-month-old girl presents for a routine examination. The patients mother says that the child is craving ice and often gasps for breath while walking or playing. Family history is unremarkable. The patient is afebrile, and vital signs are within normal limits. Her weight is at the 20th percentile and height is at the 35th percentile for age and sex. Conjunctival pallor is noted on physical examination. Laboratory findings are significant for the following:Hemoglobin 9.2 gdLMean corpuscular volume 72 μm3Mean corpuscular hemoglobin 21 pgcellSerum ferritin 9 ngmLRed cell distribution width 16 ref: 11.514.5Which of the following additional laboratory findings would most likely be found in this patient?? A: transferrin saturation, B: total iron binding capacity TIBC, C: reticulocyte count, D: Bone marrow biopsy showing ringed sideroblasts, E: hemoglobin A2,  <response>: This is a question about iron deficiency anemia in a young child. The key findings in the stem are low hemoglobin, low MCV, low MCH, low ferritin, and high RDW. This indicates microcytic, hypochromic anemia due to iron deficiency. The correct additional lab finding would show evidence of increased iron transport and utilization. Choices A and B indicate increased iron binding capacity and transport. Choice C indicates increased production of new RBCs, which may be seen in iron deficiency as the bone marrow attempts to compensate. Choices D and E relate to other types of anemia not indicated here.B: total iron binding capacity TIBC 