The most common cause of ambiguous genitalia in a newborn is –
Correct Answer: 21 hydroxylase deficinece
Description: Ans. is 'a' i.e., 21 hydroxylase deficiency o Congenital adrenal hyperplasia due to classic 21-Hydroxylase deficiency is the most common cause of ambiguous genitalia in the newborn. Virilization is apparent at bih in the female and within the first 2-3 years of life in the male.
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Pediatrics
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