All of the following calcium channel blockers are useful in the treatment of cardiac arrhythmias EXCEPT:

Correct Answer: D

Rationale: Rationale: Nifedipine is a dihydropyridine calcium channel blocker primarily used for hypertension and angina, not for cardiac arrhythmias. Bepridil, Diltiazem, and Verapamil are non-dihydropyridine calcium channel blockers that are effective in treating cardiac arrhythmias by slowing down the heart rate and controlling abnormal heart rhythms. Nifedipine does not possess significant antiarrhythmic properties compared to the other options, making it the incorrect choice for the treatment of cardiac arrhythmias.

Correct Answer: C

Rationale: The correct answer is C: Prolactin deficiency. Bromocriptine is a dopamine agonist used to treat conditions caused by excessive prolactin secretion, such as prolactin-secreting adenomas, amenorrhea-galactorrhea, and acromegaly. Prolactin deficiency would not be an indication for bromocriptine as it works by decreasing prolactin levels. Therefore, choice C is the correct answer. Choices A, B, and D are incorrect because they are all conditions where bromocriptine would be indicated based on its mechanism of action in reducing prolactin levels.

Correct Answer: C

Rationale: Rationale: 1. Ethinyl estradiol is a synthetic estrogen, not a natural estrogen. 2. Estradiol, estrone, and estriol are natural estrogens produced by women. 3. Ethinyl estradiol is commonly found in birth control pills. 4. Estrogen-17β is the form of estrogen predominantly produced by women. Summary: Ethinyl estradiol is the correct answer because it is a synthetic estrogen, unlike estradiol, estrone, and estriol, which are natural estrogens produced by women.

Correct Answer: C

Rationale: Rationale: Aspirin is not indicated for relieving severe visceral pain like myocardial infarction, cancer pain, renal or biliary colic. Aspirin is primarily used for its anti-inflammatory and antiplatelet effects, making choices A, B, and D correct indications. Choice C is incorrect as aspirin is not a preferred analgesic for visceral pain.

Correct Answer: D

Rationale: The correct answer is D: All of the above. Monoclonal antibodies are laboratory-produced molecules designed to target specific antigens. Trastuzumab targets HER2 protein in breast cancer, Rituximab targets CD20 antigen in B-cell lymphoma, and OKT-3 targets CD3 antigen in organ transplant rejection. Therefore, all choices A, B, and C are examples of monoclon, antibodies, making option D the correct answer. The other choices (A, B, C) are incorrect because they are individual examples of monoclonal antibodies, but the question asks for all correct options.