**Core Concept**
Beta-adrenoceptor blocking agents, also known as beta blockers, are a class of medications used to treat various cardiovascular conditions by blocking the effects of the hormone epinephrine (adrenaline) and reducing the heart rate and blood pressure. In patients with renal failure, certain beta blockers can be problematic due to their pharmacokinetic properties.

**Why the Correct Answer is Right**
The correct answer is **C. Bisoprolol**. Bisoprolol is a lipophilic beta-1 selective adrenoceptor blocker with a long half-life, which can lead to significant accumulation in patients with renal failure. This accumulation can result in enhanced beta-blocking activity, potentially causing hypotension, bradycardia, and even cardiac arrest in severe cases. In contrast, hydrophilic beta blockers like atenolol and nadolol are excreted primarily by the kidneys and are less likely to accumulate in patients with renal failure.

**Why Each Wrong Option is Incorrect**
**Option A:** **Metoprolol** is also a beta blocker, but it has both hydrophilic and lipophilic properties, and its pharmacokinetics are less affected by renal failure compared to bisoprolol.
**Option B:** **Carvedilol** is a non-selective beta blocker with additional alpha-1 blocking activity, which is not specifically contraindicated in renal failure.

**Clinical Pearl / High-Yield Fact**
When choosing a beta blocker for patients with renal failure, consider the drug's lipophilicity and half-life to minimize the risk of accumulation and adverse effects.

**Correct Answer: C. Bisoprolol**