Correct Answer: B

Rationale: In pediatric clinical assessment, a child at two years of age with fast breathing but without chest indrawing or stridor when calm is classified as having pneumonia. Fast breathing in this context is a key symptom used in the Integrated Management of Childhood Illness (IMCI) guidelines to diagnose pneumonia in children under five years old. The absence of chest indrawing or stridor when the child is calm helps differentiate this case from other respiratory conditions, making pneumonia the likely classification. Choices A, C, and D are incorrect. 'Very severe disease' is too broad and not specific to the symptoms described. 'No pneumonia' is also incorrect as the symptoms match the presentation of pneumonia. 'Local infection' is too vague and does not specifically address the respiratory symptoms observed.

Correct Answer: A

Rationale: Squatting increases systemic vascular resistance, which leads to a reduction in the right-to-left shunting of blood in children with tetralogy of Fallot. This helps improve oxygenation by balancing the pulmonary and systemic blood flow. The squatting position decreases the pressure in the right ventricle and reduces the magnitude of the right-to-left shunt by increasing afterload, thereby improving oxygenation. Choices B, C, and D are incorrect because squatting does not decrease arterial blood flow away from the heart, is not related to being tachycardic, and does not increase the workload of the heart.

Correct Answer: C

Rationale: The most appropriate technique to use when explaining a central line dressing change to a preschool-age client is to let the child perform a dressing change on a doll. Preschool-age children learn best through play and hands-on activities. Allowing the child to practice on a doll helps them understand the procedure in a non-threatening and interactive way. This technique can reduce anxiety, increase cooperation, and enhance the child's understanding of the dressing change process. Choices A and B do not provide a hands-on approach, which is crucial for preschool-age children. Choice D is incorrect as providing an interactive experience is more effective than just showing pictures or giving verbal instructions.

Correct Answer: B

Rationale: In typhoid fever, the rash typically appears on the third day after symptoms first appear. This rash can help in diagnosing the disease along with other symptoms such as fever, malaise, and abdominal pain. Choices A, C, and D are incorrect because the rash in typhoid fever usually appears on the third day, not the second, fourth, or seventh day after the symptoms begin.

Correct Answer: A

Rationale: When a child shows a lack of interest in various activities, including school, exercise, and family outings, it is essential to address the underlying reasons. Recommending that the child see a counselor at school is crucial to explore potential issues and provide appropriate support and guidance. This approach can help identify any emotional, social, or behavioral concerns the child may be experiencing and facilitate early intervention and support. Choice B is incorrect because dismissing the mother's concerns and assuming the child will grow out of it without addressing the issue is not appropriate. Choice C is incorrect because while some children may go through phases of disinterest, it is essential to investigate further rather than generalizing. Choice D is incorrect because waiting until the next visit without taking proactive steps to address the current lack of interest may delay necessary support and intervention.