Correct Answer: D

Rationale: The correct answer is D. At 18 months, it is expected for a child to have erupted around 16 deciduous teeth. The rationale for this answer is based on dental development milestones. By age 3, most children should have their full set of 20 primary teeth. Therefore, the nurse should inform the mother that it is normal for an 18-month-old to have around 16 teeth. Choice A is incorrect as comparing the mother's teeth at that age is irrelevant to the child's dental development. Choice B is incorrect because all 20 deciduous teeth should be present by age 3, not 4. Choice C is incorrect as having 12 teeth at 18 months is below the expected number of erupted teeth for that age.

Correct Answer: C

Rationale: The correct answer is C: Perform an otoscopic examination of the left naris. The rationale for this is that the child presenting with purulent, malodorous drainage from one naris may indicate a foreign body lodged in the left naris causing infection. By performing an otoscopic examination, the nurse can visualize inside the naris to identify any foreign body or signs of infection. This step is crucial for determining the appropriate treatment plan. Choices A, B, and D are incorrect: A: Referring the child for an antibiotic prescription without further assessment is premature and may not address the underlying cause. B: Having the mother bring the child back in 1 week delays the necessary examination and potential treatment. D: Telling the mother that this is normal without proper assessment could lead to overlooking a potential health issue that requires intervention.

Correct Answer: C

Rationale: The correct answer is C because the nurse should use the Snellen chart positioned 6.1 m (20 ft) away to assess visual acuity. This is the standard method for testing distance vision. The nurse should ask the patient to read the letters on the chart from the top row down, covering one eye at a time if necessary. This method provides an accurate measurement of visual acuity at a distance. A: Performing the confrontation test assesses visual fields, not visual acuity. B: Using a Jaeger card is for near vision testing, not distance visual acuity. D: Assessing the ability to read newsprint at a close distance does not provide an accurate measurement of visual acuity at a distance.

Correct Answer: B

Rationale: The correct answer is B: supraclavicular area. Enlarged submental lymph nodes can indicate a systemic issue. Assessing the supraclavicular area is important as it contains Virchow's node, which may indicate malignancy or metastasis. Choices A, C, and D are incorrect as they do not specifically target the area most likely to reveal significant findings related to the enlarged submental lymph nodes.

Correct Answer: A

Rationale: The correct answer is A: The presence of tears along the inner canthus. This is a normal finding during an eye examination as tears are produced by the lacrimal gland and drain into the nasolacrimal duct, which exits at the inner canthus. This indicates proper tear production and drainage. Incorrect choices: B: A blocked nasolacrimal duct in a newborn infant - This would present as excessive tearing and discharge. C: A slight swelling over the upper lid and along the bony orbit if the patient has a cold - This could indicate inflammation due to infection. D: The absence of drainage from the puncta when the inner orbital rim is pressed - This would suggest an issue with the lacrimal drainage system.