Tick the drug used for HIV infection treatment, a derivative of nucleosides:

Correct Answer: B

Rationale: The correct answer is B: Zidovudine. Zidovudine is a nucleoside analog reverse transcriptase inhibitor used in the treatment of HIV infection. It works by inhibiting the reverse transcriptase enzyme, crucial for viral replication. Acyclovir (A) is used for herpes infections, Gancyclovir (C) for cytomegalovirus, and Trifluridine (D) for ocular herpes. They are not derivatives of nucleosides and are not used for HIV treatment.

Correct Answer: B

Rationale: The correct answer is B: Amiodarone. Amiodarone is the most appropriate choice because it is a Class III antiarrhythmic drug that is effective in treating various types of arrhythmias, including ventricular and atrial arrhythmias. It works by prolonging the action potential duration and refractory period of cardiac tissue, helping to stabilize the heart's rhythm. Quinidine (A) is a Class I antiarrhythmic drug with potential side effects and limited efficacy. Verapamil (C) is a calcium channel blocker that is more suitable for treating certain types of supraventricular arrhythmias but not as effective for other types. Propranolol (D) is a beta-blocker that may be used for certain arrhythmias, but it is not as effective or versatile as amiodarone for treating various types of arrhythmias.

Correct Answer: C

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.

Correct Answer: B

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