Fluorouracil belongs to:

Correct Answer: B

Rationale: Fluorouracil is an antimetabolite that interferes with DNA and RNA synthesis. It is used to treat various cancers by inhibiting cell growth. This makes option B the correct choice. Antibiotics (A) target bacteria, not cancer cells. Plant alkaloids (C) are derived from plants and have different mechanisms of action. Bone marrow growth factors (D) stimulate the production of blood cells but do not directly inhibit cancer cell growth.

Correct Answer: B

Rationale: The correct answer is B: Add nitroglycerin to the therapeutic regimen. Nitroglycerin is a standard treatment for variant angina as it helps dilate blood vessels, increasing blood flow to the heart. This can help relieve chest pain associated with the condition. Choice A is incorrect as nifedipine and propranolol are both used to treat angina, but nifedipine is not specifically indicated for variant angina. Choice C is incorrect as captopril is an ACE inhibitor used for hypertension and heart failure, not specifically for variant angina. Choice D is incorrect as nifedipine and hydrochlorothiazide are both used for hypertension but not specifically for variant angina.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.