The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A male newborn is evaluated 24 hours after delivery for high-pitched crying, poor feeding, rhinorrhea, and low-grade fever. He was born at 40 weeks' gestation at 2514 g (5.54 lb) to a 28-year-old woman, gravida 3, para 2, by an uncomplicated cesarean section. Apgar scores were 8 and 9 at 1 and 5 minutes, respectively. The mother did not receive prenatal care. The infant's temperature is 38.0°C (100.4°F), pulse is 170/min, and blood pressure is 71/39 mm Hg. Examination shows hyperreflexia, tremors, and an excessive startle response. These symptoms are mostly like due to maternal use of which of the following?   (A) Mu receptor agonist   (B) Nicotinic acetylcholine receptor agonist   (C) Monoamine reuptake antagonist   (D) Thyroperoxidase inhibitor
['(A) Mu receptor agonist <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Mu receptor agonist \n (B) Nicotinic acetylcholine receptor agonist \n (C) Monoamine reuptake antagonist \n (D) Thyroperoxidase inhibitor <> possible answers', "  A male newborn is evaluated 24 hours after delivery for high-pitched crying, poor feeding, rhinorrhea, and low-grade fever. He was born at 40 weeks' gestation at 2514 g (5.54 lb) to a 28-year-old woman, gravida 3, para 2, by an uncomplicated cesarean section. Apgar scores were 8 and 9 at 1 and 5 minutes, respectively. The mother did not receive prenatal care. The infant's temperature is 38.0°C (100.4°F), pulse is 170/min, and blood pressure is 71/39 mm Hg. Examination shows hyperreflexia, tremors, and an excessive startle response. These symptoms are mostly like due to maternal use of which of the following? <> context@"]