Correct Answer: C

Rationale: The FACES Pain Rating Scale is suitable for children as young as 3 years of age. It uses facial expressions to depict different levels of pain, making it easy for young children to understand and use. The Poker Chip Tool is validated for children aged 4 and older who have a certain level of cognitive ability. The Visual Analog Scale is more appropriate for children aged 7 and above. The Word-Graphic Rating Scale, which uses descriptive words, is recommended for children in the age range of 4 to 17 years.

Correct Answer: B

Rationale: Undetected strabismus can lead to amblyopia, where the brain favors one eye over the other, potentially resulting in permanent vision loss in the affected eye.

Correct Answer: B

Rationale: The correct answer is B: 'Observe for projectile vomiting.' Projectile vomiting is a classic sign of pyloric stenosis, caused by obstruction at the pylorus. Choice A is incorrect as metabolic alkalosis, not acidosis, often occurs due to the loss of hydrochloric acid from persistent vomiting. Choice C is incorrect as frequent, small feedings are preferred to prevent overloading the stomach. Choice D is incorrect as placing the infant in an upright position after feeding can help reduce reflux.

Correct Answer: A

Rationale: The correct answer is A. By 8 months, an infant should be able to transfer objects between hands, which is an important motor skill milestone. This action shows coordination and developing fine motor skills. Choices B, C, and D involve more advanced motor skills that are typically not expected at 8 months of age. Drinking from a cup, holding a pencil to scribble, and engaging in purposeful play with toys are skills that develop later in infancy.

Correct Answer: C

Rationale: Pure tone audiometry is an appropriate and effective screening test for hearing in a 5-year-old child, helping to assess the ability to hear various frequencies and volumes.