Correct Answer: A

Rationale: Rubeola (measles) is characterized by a high fever and the presence of Koplik spots, which are not seen in rubella (German measles). Therefore, the correct answer is A. Choice B, rash on the trunk with pruritus, is more indicative of rubella rather than rubeola. Choice C, nausea, vomiting, and abdominal cramps, are not specific differentiating symptoms between rubeola and rubella. Choice D, characteristics of a cold followed by a rash, does not specifically distinguish between rubeola and rubella.

Correct Answer: C

Rationale: The most likely nursing diagnosis for a 1-month-old girl with trisomy 18, characterized by low-set ears and severe hypotonia, is 'Grieving related to the child's poor prognosis.' Trisomy 18 is associated with a poor prognosis, and families often experience grief as they come to terms with the challenges and uncertainties associated with the condition. 'Interrupted family process' may not be as relevant since the primary focus is on the child's condition. 'Deficient knowledge related to the genetic disorder' could be important but may not be the most likely initial concern, as emotional support for the family is crucial at this point. 'Ineffective coping related to the stress of providing care' is a broad diagnosis that does not specifically address the emotional response to the child's prognosis, which is the primary concern in this case.

Correct Answer: B

Rationale: The correct preoperative teaching for a 2-year-old child undergoing surgery involves using a doll to demonstrate the procedure. This method helps the child understand what to expect in a non-threatening and visual way, making the experience less intimidating. Explaining the procedure in simple terms (Choice A) may not effectively convey the details to a young child. Showing pictures of the hospital environment (Choice C) may not directly address the surgical procedure itself. Allowing the child to play with medical equipment (Choice D) can be unsafe and may not effectively prepare the child for the surgery.

Correct Answer: C

Rationale: Preventing straining at stool is crucial postoperatively after heart surgery for tetralogy of Fallot to avoid increasing intrathoracic pressure and placing stress on the surgical site. This can help prevent complications and promote faster healing. While crying, coughing, and unnecessary movement are common postoperative behaviors, they are not specifically linked to worsening outcomes in this context. Straining at stool is particularly emphasized due to its potential to impact the surgical site and overall recovery process.

Correct Answer: A

Rationale: The correct answer is A: Sterility. Mumps can lead to serious complications such as sterility, especially in adolescent males. Vaccination is essential to prevent this potential outcome. Hypopituitarism (Choice B) is not a typical complication of mumps. Choices C and D, decrease in libido and decrease in androgens, are not directly associated with mumps complications, particularly in the context of adolescents.