A nurse is caring for a 6-week-old infant who has pyloric stenosis. Which of the following clinical manifestations should the nurse expect?

The correct answer is Choice A.Choice A rationaleProjectile vomiting is a hallmark symptom of pyloric stenosis. It occurs due to the obstruction at the pylorus, causing forceful expulsion of stomach contents. This symptom typically appears in infants between 3 to 6 weeks of age.Choice B rationaleA rigid abdomen is not a typical symptom of pyloric stenosis. It may indicate other abdominal issues, such as peritonitis or bowel obstruction.Choice C rationaleRed currant jelly stools are associated with intussusception, not pyloric stenosis. Intussusception involves the telescoping of one part of the intestine into another, leading to bowel obstruction and characteristic stool appearance.Choice D rationaleDistended neck veins are not related to pyloric stenosis. This symptom is more commonly associated with cardiac conditions or severe respiratory distress.