Correct Answer: D

Rationale: The correct answer is D, 'Small for gestational age.' A small for gestational age, or small-for-date, infant is any child whose intrauterine growth rate was slowed and whose birth weight falls below the 10th percentile on intrauterine growth curves. Choices A and B, 'Postterm' and 'Postmature,' refer to infants born after 42 weeks of gestational age regardless of birth weight, and do not specifically address growth rate. Choice C, 'Low birth weight,' refers to infants with a birth weight less than 2500 g (5.5 pounds) regardless of gestational age, which is a different classification compared to being small for gestational age.

Correct Answer: C

Rationale: Vegetables, particularly pureed ones, are often recommended as a first solid food for infants because they are easy to digest and less likely to cause allergies. Fruits can be introduced later due to their natural sweetness, while eggs and meat are typically introduced after fruits and vegetables as they may pose a higher risk of allergies.

Correct Answer: D

Rationale: Acetaminophen (Tylenol) is recommended to help relieve the discomfort associated with acute otitis media, such as pain and fever. Elevating the baby's head during sleep can also help with drainage and relieve pressure, making choice A incorrect. Administering an antibiotic may be necessary for bacterial otitis media but is not usually the first-line treatment for acute otitis media, so choice B is incorrect. Placing the baby to sleep with a bottle can increase the risk of ear infections due to the pooling of milk around the Eustachian tube, so choice C is incorrect.

Correct Answer: B

Rationale: The peak age for the onset of minimal change nephrotic syndrome (MCNS) is typically between 4 and 5 years old. MCNS is the most common cause of nephrotic syndrome in children, particularly within this age range.

Correct Answer: D

Rationale: The correct answer is D, regression. Regression occurs when a child reverts to an earlier behavior, such as having accidents after being successfully toilet trained. This regression often happens due to stress or changes in routine. Choices A, B, and C are incorrect because positive reinforcement involves encouraging desired behavior, desensitization is a process of reducing sensitivity to a stimulus, and phobia is an intense fear or aversion to a specific object or situation, none of which directly apply to the described situation of the child having accidents after being toilet trained.