This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
What is the most likely diagnosis in a full-term neonate with electrolyte abnormalities and this exam finding? 
Select and explain. 
A. Congenital adrenal hyperplasia, B. Hypospadias with cryptorchidism, C. Preterm ovarian hyperstimulation syndrome, D. Turner syndrome
A: Congenital adrenal hyperplasia
Answer: A: Congenital adrenal hyperplasia 
Explanation: Answer A. Congenital adrenal hyperplasiaEvaluation of this neonate with ambiguous genitalia revealed bilateral adrenal hypertrophy, a markedly elevated 17-hydroxyprogesterone level, and 46 XX karyotype. Salt-losing congenital adrenal hyperplasia due to 21-hydroxylase deficiency in a female infant was diagnosed.