The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 1-day-old infant is in the neonatal intensive care unit due to respiratory failure from pulmonary hypoplasia. The mother is a healthy 32-year-old woman who did not have regular prenatal exams. On physical examination, you notice low-set ears and retrognathia with abnormal extremity development. Which of the following abnormalities is associated with the most likely cause of this patient's symptoms?   (A) Hepatosplenomegaly   (B) Posterior urethral valves   (C) Rocker bottom feet   (D) Duodenal atresia
['(B) Posterior urethral valves <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Hepatosplenomegaly \n (B) Posterior urethral valves \n (C) Rocker bottom feet \n (D) Duodenal atresia <> possible answers', "  A 1-day-old infant is in the neonatal intensive care unit due to respiratory failure from pulmonary hypoplasia. The mother is a healthy 32-year-old woman who did not have regular prenatal exams. On physical examination, you notice low-set ears and retrognathia with abnormal extremity development. Which of the following abnormalities is associated with the most likely cause of this patient's symptoms? <> context@"]