**Core Concept**
Autoclaving is a widely accepted and effective method of sterilization that utilizes high-pressure steam to kill microorganisms. This process involves the use of steam under pressure to achieve temperatures above 121°C, thereby denaturing proteins and disrupting cellular structures.

**Why the Correct Answer is Right**
Autoclaving is the preferred method for sterilizing medical equipment, especially heat-stable items like glassware and metal instruments. The high temperature and pressure of the steam penetrate deep into complex structures, ensuring the elimination of bacteria, viruses, and spores. This process is particularly effective against Clostridium difficile and other resistant organisms.

**Why Each Wrong Option is Incorrect**
**Option A:** Ethylene oxide is a chemical sterilant used for heat-sensitive items, but it is not the most effective method for sterilizing equipment that can withstand high temperatures.
**Option B:** Dry heat sterilization is a slow process that is typically used for items that cannot be exposed to moisture, but it is not as effective as autoclaving for general sterilization purposes.
**Option C:** Gamma radiation is a method of sterilization used for medical devices and equipment, but it is not as widely used or effective as autoclaving for routine sterilization.

**Clinical Pearl / High-Yield Fact**
When using autoclaves, it is essential to ensure that the equipment is properly loaded, sealed, and maintained to prevent the formation of steam pockets and ensure effective sterilization.

**Correct Answer: A. Autoclaving is the most effective method of sterilization.**