**Core Concept**
Inhalational anesthetics are a class of gases used for inducing and maintaining general anesthesia. They work by depressing the central nervous system, leading to a decrease in consciousness and anesthetic effect. The ideal inhalational anesthetic for induction should have a fast onset of action and a high potency.

**Why the Correct Answer is Right**
Sevoflurane is a commonly used inhalational anesthetic for induction due to its rapid onset of action and low pungency, making it suitable for inhalation. It is a halogenated ether that undergoes biotransformation in the liver to produce inorganic fluoride ions. The inorganic fluoride ions are responsible for the nephrotoxicity associated with sevoflurane. Sevoflurane also undergoes degradation to produce compound A, which is a nephrotoxin. However, the concentration of compound A is typically low and does not pose a significant risk to patients.

**Why Each Wrong Option is Incorrect**
**Option A:** Desflurane is a potent inhalational anesthetic but is highly pungent and irritates the airway, making it unsuitable for inhalation induction.
**Option B:** Isoflurane is another potent inhalational anesthetic but has a slower onset of action compared to sevoflurane and is not typically used for induction.
**Option C:** Halothane is an older inhalational anesthetic that is associated with hepatotoxicity and is no longer commonly used for induction.

**Clinical Pearl / High-Yield Fact**
Sevoflurane is contraindicated in patients with renal failure due to the risk of nephrotoxicity associated with the inorganic fluoride ions produced during biotransformation.

**Correct Answer: C. Sevoflurane. Sevoflurane**