Correct Answer: A

Rationale: The correct answer is A: parotid gland. This gland is located in the cheek in front of the ear. It is the largest salivary gland in the human body. The parotid gland secretes saliva into the mouth through Stenson's duct. The other choices are incorrect because Stenson's gland does not exist, the sublingual gland is located under the tongue, and the submandibular gland is located under the mandible. Therefore, the parotid gland is the only gland that fits the description given in the question.

Correct Answer: A

Rationale: The correct answer is A: Weber. The Weber test has been found to yield unreliable data recently due to its subjectivity and inconsistency in interpretation. The test involves placing a vibrating tuning fork on the midline of the head to assess lateralization of sound. However, factors like bone conduction and individual perception can influence the results, leading to inaccuracies. Romberg test (B) evaluates balance, Whisper test (C) assesses hearing sensitivity, and Audiometer (D) measures hearing thresholds objectively. These tests are more reliable in providing accurate data compared to the Weber test.

Correct Answer: D

Rationale: The presence of black and white dots on the tympanic membrane and ear canal wall during an otoscopic examination suggests a yeast or fungal infection. This is because yeast or fungal infections commonly present as white or black dots in the ear canal. Malignancy would typically manifest as abnormal growths or masses, not dots. Viral infections usually do not present as specific dots on the tympanic membrane. Blood in the middle ear would appear as red or pinkish fluid behind the eardrum, not as black and white dots. Therefore, the correct answer is D: Yeast or fungal infection.

Correct Answer: B

Rationale: The correct answer is B because rubella can indeed damage the organ of Corti in the fetus, which is responsible for hearing. During the first trimester, when the hearing structures are forming, any damage to the organ of Corti can result in impaired hearing for the infant. Choice A is incorrect because rubella can impact the fetus, including the organs responsible for hearing. Choice C is incorrect because rubella can be harmful to the fetus at any stage of pregnancy, not just the second trimester. Choice D is incorrect because CN VIII (the vestibulocochlear nerve) is not directly affected by rubella, rather it is the organ of Corti that is damaged.

Correct Answer: C

Rationale: The correct answer is C: CN VIII. The vestibulocochlear nerve (CN VIII) is responsible for conducting nerve impulses from the organ of Corti in the inner ear to the brain. This nerve specifically carries auditory information to the brainstem and auditory cortex for processing. Choice A (CN I) is incorrect as it is the olfactory nerve responsible for smell. Choice B (CN III) is incorrect as it is the oculomotor nerve responsible for eye movement. Choice D (CN XI) is incorrect as it is the accessory nerve responsible for neck and shoulder movements.