Which of the following medications is known for its pain-relieving properties?

Both acetaminophen and aspirin are recognized for their pain-relieving properties, making the choice that includes both correct.

Acetaminophen, often known by the brand name Tylenol, is widely used for its analgesic (pain-relieving) and antipyretic (fever-reducing) effects. It works by inhibiting a specific enzyme in the brain that is involved in the synthesis of prostaglandins, which are substances that mediate pain and fever.

Aspirin, on the other hand, is a nonsteroidal anti-inflammatory drug (NSAID) that not only relieves pain but also reduces inflammation and fever. It works by blocking the production of prostaglandins through the inhibition of the cyclooxygenase enzymes, which play a key role in the inflammatory process.

Considering both medications have established pain-relieving effects, option C is accurate as it encompasses the suitability of both acetaminophen and aspirin for pain management.