Indicate selective catechol-O-methyltransferase inhibitor, which prolongs the action of levodopa by diminishing its peripheral metabolism:

Correct Answer: C

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

Correct Answer: B

Rationale: Second-order pain, often called slow pain, is dull, burning, and poorly localized, transmitted via unmyelinated C fibers. Sharp, well-localized pain (first-order) is linked to A-delta fibers, and second-order pain typically requires opioids, not just non-narcotics, making 'Dull, burning pain' correct.

Correct Answer: B

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

Correct Answer: C

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

Correct Answer: A

Rationale: Non-narcotic analgesics, such as NSAIDs and paracetamol, are most effective against pain linked to inflammation or tissue damage (e.g., arthritis, headache) due to their inhibition of prostaglandin synthesis. While they may help in other contexts, their primary efficacy is in inflammatory pain, making 'A' correct.