Explanation:

Let’s break down the options:

- Option 1: Dextromethorphan

This one’s actually a cough suppressant. It doesn’t help lower fever or treat regular pain.

- Option 2: Bismuth

You’ll see this in things like Pepto-Bismol. It helps with stomach upset, not pain or fever.

- Option 3: Paracetamol

This is the go-to for pain relief and lowering a high body temperature. People use it for headaches, fever, and mild aches.

- Option 4: Guaifenesin

Its main job? Loosening phlegm in your chest. It’s not great for pain, not meant for fever.

So yes, paracetamol really is the answer here—simple, effective, and widely used for exactly those reasons.