<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 6-day-old newborn girl is brought into the hospital by her mother because of excessive vomiting and poor feeding. The mother did not have antenatal care. Her temperature is 36.8C 98.2F, blood pressure is 5030 mm Hg, and pulse is 150min. On examination, the infant is dehydrated and demonstrates signs of shock. Her genitalia are ambiguous, with fused labia and an enlarged clitoris. Laboratory results are shown:Serum sodium Na 125 mEqLSerum potassium K 6 mEqLSerum 17-hydroxyprogesterone 100,000 ngdL normal level is 1,0003,000 ngdLWhich of the following is the most likely cause of this infants condition?? A: Deficiency of 21-hydroxylase, B: Deficiency of 11-beta-hydroxylase, C: Deficiency of 17-alpha-hydroxylase, D: Deficiency of 5-alpha reductase, E: Deficiency of placental aromatase,  <response>: This is a question about congenital adrenal hyperplasia CAH in a newborn girl. The key findings are ambiguous genitalia, hyponatremia, hyperkalemia, and very elevated 17-hydroxyprogesterone level. This pattern is most consistent with 21-hydroxylase deficiency, which is the most common cause of CAH. Deficiencies of 11-beta-hydroxylase and 17-alpha-hydroxylase can also cause CAH but would not present with high 17-OHP levels. 5-alpha reductase deficiency causes undermasculinization in genetic males. Placental aromatase deficiency would not cause adrenal hyperplasia. Therefore, 21-hydroxylase deficiency is the most likely diagnosis.A: Deficiency of 21-hydroxylase 