Correct Answer: D

Rationale: The correct answer is D: 'Avoid giving citrus juice.' Citrus juice can irritate the throat after a tonsillectomy, so it should be avoided. Choice A is incorrect because blowing the nose gently is not a recommended intervention following a tonsillectomy. Choice B is incorrect as mucus in emesis is not uncommon postoperatively and does not necessarily require physician notification. Choice C is incorrect as positioning the child supine immediately postoperatively can increase the risk of airway obstruction and should be avoided.

Correct Answer: C

Rationale: Constipation is one of the most common side effects of opioid administration due to the slowing down of gastrointestinal motility. Opioids affect the bowel movements, leading to constipation. Euphoria, while a possible effect, is less common than constipation. Diuresis is not a typical side effect of opioids; instead, urinary retention may occur. Allergic reactions are rare side effects of opioids, with symptoms such as rash, itching, or anaphylaxis.

Correct Answer: C

Rationale: By around 10 months, infants often start to say "mama" and "dada" with meaning, associating these words with their parents.

Correct Answer: C

Rationale: By 5 months, an infant's weight should typically double from birth, and length should increase by approximately 50%.

Correct Answer: C

Rationale: Fear of strangers typically begins around 6 months as infants start recognizing familiar and unfamiliar faces, which is part of their social development.