Tick the antimycobacterial drug belonging to antibiotics:

Correct Answer: D

Rationale: The correct answer is D: Rifampin. Rifampin is an antimycobacterial drug that is commonly used to treat tuberculosis and other mycobacterial infections. It works by inhibiting the RNA polymerase enzyme in mycobacteria, leading to the suppression of bacterial growth. Isoniazid (Choice A) is also used for tuberculosis treatment, but it is not classified as an antibiotic. PAS (Choice B) is an antimycobacterial drug but is not an antibiotic. Ethambutol (Choice C) is also used to treat tuberculosis, but it works by inhibiting cell wall synthesis rather than RNA polymerase. Therefore, the correct choice is Rifampin as it directly targets the mycobacterial RNA polymerase enzyme, making it an effective antibiotic for treating mycobacterial infections.

Correct Answer: A

Rationale: Flutamide is the correct answer as it is a known antiandrogen drug used to treat conditions like prostate cancer. It works by blocking the action of androgens in the body. Aminoglutethimide is not an antiandrogen but an aromatase inhibitor. Tamoxifen is a selective estrogen receptor modulator used in breast cancer treatment. Testosterone is a natural male hormone and not an antiandrogen. Therefore, Flutamide is the correct choice for an antiandrogen drug.

Correct Answer: B

Rationale: The correct answer is B: Niacin. Niacin can cause hepatotoxicity and exacerbate liver conditions, which would be a concern in this patient. Cholestyramine (A) works in the intestines, Ezetimibe (C) inhibits cholesterol absorption, and Lovastatin (D) inhibits cholesterol synthesis in the liver, none of which are contraindicated in liver conditions.

Correct Answer: C

Rationale: The correct answer is C: Plasminogen activator. Plasminogen activator is responsible for converting plasminogen into active plasmin, which is an essential enzyme in the fibrinolysis process. Plasminase (A) and Plasminogenase (B) are not actual enzymes involved in this conversion. Plasminogen activator inhibitor (D) works to regulate the activity of plasminogen activator, rather than directly converting plasminogen into plasmin.

Correct Answer: C

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