The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 1-month-old girl is brought to the emergency department with persistent vomiting, dehydration, and irritability. Over the past week, she has been projectile vomiting after most feedings. Initially, the vomiting would occur just once or twice a day, but now it occurs after every feed. However, her appetite hasn’t decreased, and she seeks milk right after each episode of vomiting. She was born at 39 weeks gestation via spontaneous vaginal delivery and is breastfed exclusively. On physical exam, the vital signs include: temperature 37.5°C (99.5°F), blood pressure 85/55 mm Hg, respiratory rate 28/min, and heart rate 150/min. On examination, she appears to be mildly dehydrated, listless, and irritable. Her abdomen is soft and nontender with a palpable olive-shaped mass in the epigastric region. Which of the following acid-base disturbances is most likely associated with this patient’s condition?   (A) Respiratory alkalosis   (B) Metabolic alkalosis   (C) Respiratory acidosis   (D) Mixed respiratory and metabolic acidosis
['(B) Metabolic alkalosis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Respiratory alkalosis \n (B) Metabolic alkalosis \n (C) Respiratory acidosis \n (D) Mixed respiratory and metabolic acidosis <> possible answers', '  A 1-month-old girl is brought to the emergency department with persistent vomiting, dehydration, and irritability. Over the past week, she has been projectile vomiting after most feedings. Initially, the vomiting would occur just once or twice a day, but now it occurs after every feed. However, her appetite hasn’t decreased, and she seeks milk right after each episode of vomiting. She was born at 39 weeks gestation via spontaneous vaginal delivery and is breastfed exclusively. On physical exam, the vital signs include: temperature 37.5°C (99.5°F), blood pressure 85/55 mm Hg, respiratory rate 28/min, and heart rate 150/min. On examination, she appears to be mildly dehydrated, listless, and irritable. Her abdomen is soft and nontender with a palpable olive-shaped mass in the epigastric region. Which of the following acid-base disturbances is most likely associated with this patient’s condition? <> context@']