A previously healthy 6 week old female infant is found unresponsive in her crib. In the emergency department, she is noted to be well developed and well nourished with normal blood pressure and appearance of the genitalia but with increased pigmentation of her skin. Blood glucose level is 30mg/dL. the most likely diagnosis is-

• A. Familial glucocorticoid deficiency
• B. CAH due to 21 alpha hydroxylase deficiency
• C. Insulinoma
• D. Cushing syndrome