Correct Answer: B

Rationale: The correct answer is B, the Hepatitis B vaccine. This vaccine is recommended for all newborns to prevent Hepatitis B infection, which can lead to chronic liver disease and liver cancer. The Hepatitis B vaccine is a crucial part of the routine immunization schedule for infants. Choices A, C, and D are incorrect because the recommended vaccine for newborns is specifically Hepatitis B, not Hepatitis A, Hepatitis C, or a combination of Hepatitis A, B, and C vaccines.

Correct Answer: B

Rationale: The correct answer is B: Increased protein. Children with Crohn's disease require a diet high in protein to support growth and tissue repair. High fiber should be avoided as it can exacerbate symptoms of Crohn's disease. Reducing calories can lead to malnutrition, which is detrimental in this condition. Herbal supplements should be used cautiously and only under medical advice as they may interact with medications or worsen symptoms.

Correct Answer: B

Rationale: The correct answer is B: Anorexia and malaise. The prodromal phase of acute viral hepatitis is characterized by nonspecific symptoms such as anorexia (loss of appetite) and malaise (general feeling of discomfort). These symptoms typically precede the more specific signs of jaundice, dark urine, and pale stools that manifest in the icteric phase. Choices A, C, and D are incorrect because bruising and lethargy, fatigability and jaundice, and dark urine and pale stools are typically seen in later stages of acute viral hepatitis, not in the prodromal phase.

Correct Answer: D

Rationale: The correct answer is D: Prepare for surgery. Acute appendicitis is a surgical emergency that requires prompt removal of the appendix to prevent complications like rupture and peritonitis. Administering antibiotics (choice A) may be part of the treatment plan but should not delay surgical intervention. Applying heat to the abdomen (choice B) is not recommended as it can worsen the inflammation of the appendix. Encouraging oral fluids (choice C) is generally beneficial, but the priority in acute appendicitis is surgical intervention.

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.