Correct Answer: C

Rationale: By 3 months, infants begin to recognize familiar faces and objects, such as their own hands. This marks the early stages of visual recognition and cognitive development.

Correct Answer: B

Rationale: The correct answer is B: Regression. Regression is a common defense mechanism where a child reverts to an earlier stage of development, such as thumb-sucking, to cope with stress. In this scenario, the 6-year-old boy is using thumb-sucking (a behavior typical of earlier developmental stages) as a way to deal with the stress of surgery. Repression (choice A) involves unconsciously blocking out thoughts or feelings, which is not applicable in this case. Rationalization (choice C) is a defense mechanism where illogical or unreasonable explanations are provided to justify behavior, which is not relevant here. Fantasy (choice D) refers to the use of imagination to escape from reality, which is also not the appropriate defense mechanism for the situation described.

Correct Answer: C

Rationale: Hypertonic solutions can damage tissues if they leak from the vein due to infiltration. It is crucial to monitor for this complication to prevent severe tissue damage. Infiltration is not solely related to the activity level of VLBW infants; it can occur due to various reasons such as vein condition, catheter placement, and fluid type. Continuous infusion pumps may not always detect infiltration, as they typically alarm for pressure changes but not all infiltration instances. Checking the infusion site regularly, preferably hourly, is essential to prevent complications like tissue damage from extravasations, fluid overload, and dehydration.

Correct Answer: B

Rationale: The correct answer is B. School-age children are typically able to play structured games with other children and follow the rules of the game. This ability reflects their growing cognitive and social development. Choice A is incorrect as school-age children often engage in group play. Choice C is incorrect as school-age children usually have more autonomy in their play choices. Choice D is incorrect as school-age children tend to form more organized play settings rather than loose groups.

Correct Answer: B

Rationale: The introduction of solid foods is recommended at 4 to 6 months when the infant's digestive system is more developed and ready for solids.