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: Pediatrics
[{'content': 'A 6-week infant with ambiguous genitalia (as shown below) presents with an episode of dehydration & shock requiring hospitalization. What is the electrolyte abnormality that you expect in this baby? \nSelect and explain. \nA. Hypokalemia, B. Hyperkalemia, C. Hypocalcemia, D. Hypercalcemia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: b. HyperkalemiaAmbiguous genitalia in an infant with dehydration & shock, suggests the diagnosis of CAH due to 21 hydroxylase deficiency', 'role': 'assistant'}]