Correct Answer: A

Rationale: The correct answer is A: Antiemetic. Chemotherapy commonly causes nausea and vomiting as adverse effects. Antiemetics are medications specifically designed to prevent or alleviate nausea and vomiting. Administering an antiemetic helps to manage these side effects and improve the patient's comfort and compliance with treatment. Antibiotics (choice B) are used to treat bacterial infections and are not directly related to combating chemotherapy side effects. Antimetabolites (choice C) are a type of chemotherapy drug, not used to combat its side effects. Anticoagulants (choice D) are used to prevent blood clots and are not indicated for managing chemotherapy-related nausea and vomiting.

Correct Answer: B

Rationale: The correct answer is B because red, open sores on the oral mucosa are a common sign of stomatitis, which can be caused by chemotherapy. Stomatitis is characterized by inflammation and ulceration of the mouth lining. The other choices are incorrect because: A: White, cottage cheese-like patches are indicative of oral thrush, a fungal infection. C: Rust-colored sputum may indicate a respiratory condition or infection, not stomatitis. D: Yellow tooth discoloration is not typically associated with stomatitis, but can be caused by various factors such as poor oral hygiene or certain foods.

Correct Answer: B

Rationale: The correct answer is B because it encourages the patient to reflect on potential causes of their fatigue, leading to a more in-depth exploration of the issue. Option A focuses on stress, not necessarily fatigue. Option C is too specific and may not uncover underlying causes. Option D assumes sleep duration is the only factor contributing to fatigue.

Correct Answer: D

Rationale: The correct answer is D: Stapedectomy. This procedure is used to correct otosclerosis by removing the stapes bone and replacing it with a prosthetic device. This restores normal hearing by allowing sound waves to travel through the ear properly. Myringotomy (A) is a procedure to drain fluid from the middle ear, not to correct otosclerosis. Mastoidectomy (B) is the removal of infected mastoid air cells, not related to otosclerosis. Myringoplasty (C) is a surgical procedure to repair a perforated eardrum, not used for otosclerosis. Stapedectomy is the most appropriate choice for correcting otosclerosis as it directly addresses the abnormal bone growth in the middle ear.

Correct Answer: B

Rationale: The correct answer is B: Clonidine (Catapres). Clonidine is known to cause headache as a side effect due to its mechanism of action affecting blood pressure regulation in the brain. Furosemide (A) is a diuretic that typically causes electrolyte imbalances, not headaches. Atenolol (C) is a beta-blocker used for hypertension, which can cause fatigue but not typically headaches. Adalat (D) is a calcium channel blocker that usually causes peripheral edema, not headaches.