Correct Answer: B

Rationale: Celiac disease often presents with steatorrhea, malnutrition, and foul-smelling stools due to the malabsorption of nutrients. Therefore, all the manifestations listed (steatorrhea, malnutrition, foul-smelling stools) are expected in a child with celiac disease. Polycythemia is not associated with celiac disease, making choice B the correct answer.

Correct Answer: B

Rationale: Celiac disease often presents with steatorrhea, malnutrition, and foul-smelling stools due to the malabsorption of nutrients. Therefore, all the manifestations listed (steatorrhea, malnutrition, foul-smelling stools) are expected in a child with celiac disease. Polycythemia is not associated with celiac disease, making choice B the correct answer.

Correct Answer: A

Rationale: The correct answer is A, Patent ductus arteriosus. This condition is characterized by a continuous 'machine-like' murmur due to abnormal blood flow between the aorta and pulmonary artery. Ventricular septal defect (choice B) is characterized by a harsh holosystolic murmur, atrial septal defect (choice C) typically presents with a fixed split S2 and a pulmonary flow murmur, and coarctation of the aorta (choice D) is associated with a systolic murmur in the back and bilateral lower extremities.

Correct Answer: B

Rationale: The correct answer is to place the baby on their back to sleep. This position is the most effective way to prevent sudden infant death syndrome (SIDS) according to research and recommendations from healthcare providers. Choice A, using a firm mattress, is important for infant safety but not as directly related to preventing SIDS. Keeping the room warm, as mentioned in choice C, is not recommended as it may increase the risk of SIDS. While breastfeeding has many benefits, choice D, breastfeeding exclusively is not the most effective method for preventing SIDS.

Correct Answer: C

Rationale: Corrected Rationale: Currant jelly-like stools, which contain blood and mucus, are characteristic of Meckel diverticulum. This symptom occurs due to the bleeding from the ectopic gastric mucosa present in the diverticulum. Steatorrhea (choice A) is not typically associated with Meckel diverticulum. Clay-colored stools (choice B) are seen in conditions affecting the biliary system. Loose stools with undigested food (choice D) may indicate malabsorption issues, but it is not specifically linked to Meckel diverticulum.