## Core Concept
The question tests the understanding of managing hepatic encephalopathy in cirrhotic patients, specifically the role of antibiotics in preventing this complication. Hepatic encephalopathy is a brain condition that's caused by liver disease. When the liver is damaged, it can't filter toxins from the blood effectively, leading to a buildup of these toxins in the brain.

## Why the Correct Answer is Right
Rifaximin is a non-absorbable antibiotic that has been shown to be effective in preventing hepatic encephalopathy in patients with cirrhosis. It works by reducing the production of ammonia by gut bacteria. Rifaximin has a broad spectrum of activity against both Gram-positive and Gram-negative bacteria and is not absorbed well from the gastrointestinal tract, making it ideal for this application as it acts locally within the gut.

## Why Each Wrong Option is Incorrect
* **Option A:** Neomycin is an aminoglycoside antibiotic that can be used to prevent hepatic encephalopathy but is less preferred due to its potential for nephrotoxicity and ototoxicity, especially with prolonged use.
* **Option B:** Metronidazole can be used as an alternative to rifaximin but is generally considered less effective and has more side effects, making it a second-line option.
* **Option D:** Ciprofloxacin is a fluoroquinolone antibiotic with broad-spectrum activity but is not typically used for the prevention of hepatic encephalopathy.

## Clinical Pearl / High-Yield Fact
A key point to remember is that rifaximin, in combination with lactulose, is often recommended for the prevention of recurrent hepatic encephalopathy. Rifaximin has a favorable side effect profile and is well-tolerated by patients.

## Correct Answer Line
**Correct Answer: C. Rifaximin.**