Correct Answer: A

Rationale: The correct answer is A: 'Mental retardation occurs if PKU is untreated.' Phenylketonuria (PKU) is a metabolic disorder that results in the inability to metabolize phenylalanine properly. Without proper dietary management, high levels of phenylalanine can lead to severe mental retardation and other neurological problems. Therefore, educating parents about the importance of early and consistent treatment to prevent mental retardation is crucial. Choice B is incorrect because testing for PKU is typically done shortly after birth, not immediately. Choice C is incorrect because treatment for PKU primarily involves strict dietary management to control phenylalanine intake, not lifelong medications. Choice D is incorrect because PKU is inherited in an autosomal recessive pattern, not as an autosomal dominant gene.

Correct Answer: A

Rationale: Monitoring the temperature of a child with minimal change nephrotic syndrome is crucial to detect early signs of infection. Infection is a common complication in nephrotic syndrome, and fever can be an early indicator. Hypertension (choice B) is not typically associated with nephrotic syndrome. Encephalopathy (choice C) is a neurological complication and would present with altered mental status rather than a change in temperature. Edema (choice D) is a common symptom of nephrotic syndrome but is not typically monitored through temperature assessment.

Correct Answer: B

Rationale: Metatarsus adductus is a condition where the front part of the foot is turned inward. It is often caused by the baby's position in the womb, leading to pressure on the foot during fetal development. Choice A is incorrect as metatarsus adductus is not primarily caused by a genetic defect in the bones. Choice C is incorrect as the cause of metatarsus adductus is known to be related to intrauterine positioning. Choice D is incorrect as metatarsus adductus specifically pertains to the foot and not the hip.

Correct Answer: C

Rationale: In this scenario, asking about the gestational age is crucial as it helps determine the stage of labor and potential complications. Knowing the number of weeks of gestation can guide the healthcare provider in assessing the progress of labor and making decisions about the care of both the mother and the baby. Choices A, B, and D are not as relevant in this urgent situation. While knowing if the bag of waters has broken is important for assessing the progress of labor, determining gestational age is more critical at this point. Asking about regular prenatal care or the number of other children does not provide immediate information necessary for managing the current situation.

Correct Answer: B

Rationale: The correct answer is B: Diarrhea. Rotavirus infection commonly presents with symptoms such as watery diarrhea, fever, vomiting, and abdominal pain. However, diarrhea is the hallmark symptom of rotavirus infection, often leading to dehydration in children. Abdominal pain (choice A) can also be present but is not as specific to rotavirus infection as diarrhea. Constipation (choice C) is not a typical symptom of rotavirus infection. While vomiting (choice D) can occur in rotavirus infection, it is more commonly associated with other gastrointestinal conditions.