Correct Answer: D

Rationale: Pegs and pounding boards are recommended as play materials for toddlers to express their anger in a constructive manner. These tools provide a safe and effective outlet for the child's emotions through physical activity. Options A, B, and C do not offer the same interactive and expressive qualities that pegs and pounding boards provide. A ball and bat may encourage aggressive behavior, a wad of clay is more suitable for creative expression rather than anger management, and a punching bag may promote violent behavior which is not appropriate for toddlers.

Correct Answer: B

Rationale: The correct answer is B: Steroids. Children receiving steroids should not receive the varicella vaccine as it can increase the risk of severe infection due to the immunosuppressive effects of steroids. Insulin (Choice A) is not a medication that contraindicates varicella vaccination. Antibiotics (Choice C) and anticonvulsants (Choice D) are also not medications that would impact the decision to immunize against varicella.

Correct Answer: C

Rationale: Visible peristalsis and weight loss are classic clinical manifestations of pyloric stenosis. Visible peristalsis refers to the wave-like movements in the abdomen caused by the stomach trying to empty into the intestines due to the obstruction at the pylorus. Weight loss is often seen due to inadequate feeding and vomiting associated with this condition. Choices A, B, and D are not typical of pyloric stenosis. Abdominal rigidity and pain on palpation are more indicative of conditions like peritonitis. A rounded abdomen and hypoactive bowel sounds are more suggestive of conditions like constipation or bowel obstruction. Distention of the lower abdomen and constipation are not specific to pyloric stenosis and may be seen in various gastrointestinal issues.

Correct Answer: D

Rationale: A common clinical manifestation of bacterial meningitis is a positive Kernig sign, indicating irritation of the meninges. Rash (Choice A) is not typically associated with bacterial meningitis. Photophobia (Choice B) can be present but is more commonly seen in viral meningitis. Jaundice (Choice C) is not a typical clinical manifestation of meningitis and is more indicative of liver dysfunction.

Correct Answer: B

Rationale: The priority nursing care after a cardiac catheterization in a 3-year-old is to monitor the site for bleeding. This is essential to promptly detect and manage any potential complications, such as hematoma or hemorrhage. Encouraging early ambulation, as mentioned in choice A, may not be safe immediately post-procedure and should be guided by the healthcare provider's instructions. Restricting fluids until blood pressure is stabilized, as in choice C, is not typically necessary after a cardiac catheterization. Comparing blood pressure in both lower extremities, as in choice D, is not the priority immediate nursing care following this procedure.