Correct Answer: C

Rationale: Step-by-step rationale for why choice C is correct: 1. Enlargement of the thyroid gland during pregnancy is a normal finding due to hormonal changes. 2. The thyroid gland enlarges to meet the increased demands of thyroid hormone production. 3. This condition is known as gestational thyrotoxicosis and is usually benign. 4. No further testing is needed for thyroid cancer unless other concerning symptoms are present. Summary: A: Not relevant as iodine deficiency is not typically associated with thyroid enlargement in pregnancy. B: Incorrect as early signs of goitre would involve more pronounced symptoms than just slight enlargement. D: Unnecessary as thyroid cancer is not a common concern in this scenario of a slightly enlarged thyroid in the third trimester of pregnancy.

Correct Answer: C

Rationale: The correct answer is C because the frontal sinuses are indeed fairly well developed at birth. This is true as the frontal sinuses start developing around the age of 7-8 years but are present in a rudimentary form at birth. This is because the frontal bone grows rapidly in the first few years of life, allowing for the development of the frontal sinuses. Choice A is incorrect because the sphenoid sinuses are not at full size at birth; they continue to develop throughout childhood. Choice B is incorrect as the maxillary sinuses reach full size around the teenage years, not after puberty. Choice D is incorrect as the frontal sinuses are also present at birth, along with the maxillary and ethmoid sinuses.

Correct Answer: D

Rationale: The correct answer is D: It helps equalize air pressure on both sides of the tympanic membrane. The eustachian tube connects the middle ear to the nasopharynx, allowing for pressure equalization. During activities like swallowing or yawning, the tube opens to allow air to flow in or out, maintaining equal pressure. This function is crucial for proper hearing and preventing discomfort or damage to the tympanic membrane. Choice A is incorrect as cerumen is produced by ceruminous glands in the ear canal, not the eustachian tube. Choice B is incorrect as the eustachian tube normally remains closed and opens only intermittently during specific actions. Choice C is incorrect as the eustachian tube does not connect the middle and outer ear; it connects the middle ear to the nasopharynx.

Correct Answer: B

Rationale: The correct answer is B: It is the most common type of glaucoma. Open-angle glaucoma is indeed the most common type, accounting for about 90% of all glaucoma cases. In open-angle glaucoma, the drainage angle of the eye remains open, but the trabecular meshwork becomes blocked over time. This leads to increased intraocular pressure, which can damage the optic nerve and result in vision loss. A, C, and D are incorrect: A: The symptoms mentioned (sensitivity to light, nausea, halos around lights) are more commonly associated with acute angle-closure glaucoma, not open-angle glaucoma. C: Immediate treatment is not necessarily needed for open-angle glaucoma as it progresses slowly, and treatment can vary based on the severity of the condition. D: Vision loss in open-angle glaucoma typically starts with the loss of peripheral vision, not central vision.

Correct Answer: A

Rationale: The correct answer is A: "Are you aware of having any allergies?" This question is appropriate because the patient's symptoms of pale, grey, and swollen nasal mucosa suggest an allergic reaction. By asking about allergies, the nurse can gather important information to determine the cause of the symptoms. B: "Do you have an elevated temperature?" - This question is not directly related to the patient's nasal symptoms and does not address the likely allergic reaction. C: "Have you had any symptoms of a cold?" - While cold symptoms may present similarly to allergies, the patient's specific symptoms of pale, grey, and swollen nasal mucosa are more indicative of an allergic reaction. D: "Have you been having frequent nosebleeds?" - This question does not directly address the patient's current symptoms and is not likely related to the nasal mucosa appearance described.