Correct Answer: A

Rationale: The correct answer is A: Varicella (Chickenpox). Varicella can lead to the complication of encephalitis, characterized by brain inflammation. Encephalitis is a known complication of chickenpox in rare cases. Scarlet fever (choice B) is caused by Streptococcus bacteria and does not typically result in encephalitis. Poliomyelitis (choice C) primarily affects the spinal cord and does not lead to encephalitis. Whooping cough (choice D) can cause severe coughing spells but does not directly result in encephalitis.

Correct Answer: B

Rationale: The short urethra in young girls predisposes them to urinary tract infections. In young girls, the proximity of the urethra to the anus and the shorter urethra compared to boys make it easier for bacteria to travel up the urinary tract, increasing the risk of infection. Increased fluid intake and frequent emptying of the bladder are actually helpful in preventing urinary tract infections by flushing out bacteria. Prostatic secretions in males are not a factor in predisposing the urinary tract to infection in children.

Correct Answer: C

Rationale: Moving a child to a regular bed by the appropriate age is not recommended as it can increase the risk of falls. Toddlers should transition to a regular bed only when developmentally ready to prevent accidents. Keeping medications in a medicine cabinet (Choice A) promotes safety by preventing accidental ingestion. Securing gates at entrances to staircases (Choice B) helps prevent falls down stairs. Buying shoes that close with Velcro rather than laces (Choice D) is a good practice to prevent tripping and falling.

Correct Answer: B

Rationale: Encouraging deep breathing exercises is crucial preoperative teaching for a child scheduled for a tonsillectomy as it helps improve lung function and can prevent postoperative complications like pneumonia. Explaining the procedure in detail may heighten the child's anxiety, making it less ideal. While discussing hydration is important, it may not be the top priority for preoperative teaching for this specific procedure. Play therapy can reduce fear and anxiety, but encouraging deep breathing exercises directly contributes to better postoperative outcomes by enhancing respiratory function.

Correct Answer: B

Rationale: The most appropriate response for the nurse in this situation is to ask for more specific information related to the developmental delays. By seeking additional details, the nurse can better understand the situation, offer appropriate support, and provide guidance tailored to the child's specific needs. Praising the parent or encouraging the plan without understanding the full context may not be beneficial. Advising the parent to have the healthcare provider help choose a program assumes the parent has not already involved the healthcare provider, which may not be the case. Explaining that the developmental delays could disappear is not appropriate as it may give false hope or minimize the parent's concerns.