<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 3500-g 7.7-lbs girl is delivered at 39 weeks gestation to a 27-year-old woman, gravida 2, para 1. Apgar scores are 8 and 9 at 1 and 5 minutes, respectively. The mother had regular prenatal visits throughout the pregnancy. She did not smoke or drink alcohol. She took multivitamins as prescribed by her physician. The newborn appears active. The girls temperature is 37C 98.6F, pulse is 120min, and blood pressure is 5535 mm Hg. Examination in the delivery room shows clitoromegaly. One day later, laboratory studies show:Hemoglobin 12.8 gdLLeukocyte count 6,000mm3Platelet count 240,000mm3SerumNa 133 mEqLK 5.2 mEqLCl 101 mEqLHCO3 21 mEqLUrea nitrogen 15 mgdLCreatinine 0.8 mgdLUltrasound of the abdomen and pelvis shows normal uterus and normal ovaries. Which of the following is the most appropriate next step in the management of this newborn patient?? A: Hydrocortisone and fludrocortisone therapy, B: Estrogen replacement therapy, C: Genital reconstruction surgery, D: Dexamethasone therapy, E: Spironolactone therapy,  <response>: This is a question about the management of a newborn girl with signs of congenital adrenal hyperplasia CAH, such as clitoromegaly, which likely indicates prenatal virilization. The lab values show normal electrolytes, kidney function, and blood counts, confirming this is an isolated endocrinopathy. CAH is caused by enzyme deficiencies in adrenal steroid synthesis, most commonly 21-hydroxylase deficiency. This results in cortisol deficiency and androgen excess.The goal is to correct the cortisol deficiency and suppress androgen overproduction. Hydrocortisone replaces cortisol. Fludrocortisone replaces aldosterone. These are the mainstays of CAH treatment.Estrogen would oppose virilization but doesnt treat the underlying disorder. Surgery may be considered later but is not an initial priority. Dexamethasone suppresses adrenal androgens but provides no cortisol. Spironolactone blocks androgen receptors but does not correct cortisol deficiency.A: Hydrocortisone and fludrocortisone therapy 