**Core Concept**
Cold sterilization is a process that achieves sterilization without the use of heat. This is particularly useful for heat-sensitive medical devices, such as certain plastics, fabrics, and biological tissues. The process relies on the antimicrobial properties of certain substances to eliminate microorganisms.

**Why the Correct Answer is Right**
The correct answer is based on the principle of using a substance with antimicrobial properties to achieve sterilization. Cold sterilization often involves the use of hydrogen peroxide gas plasma, which is a highly effective antimicrobial agent. The process involves exposing the medical device to the hydrogen peroxide gas plasma, which breaks down into oxygen and water, thereby eliminating microorganisms.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because ethylene oxide is a chemical sterilant that is typically used for sterilizing medical devices at room temperature, but it is not a cold sterilization method.

**Option B:** This option is incorrect because dry heat sterilization is a process that involves the use of high temperatures to achieve sterilization, which is not consistent with cold sterilization.

**Option C:** This option is incorrect because radiation sterilization is a process that involves the use of ionizing radiation to achieve sterilization, which is not a cold sterilization method.

**Clinical Pearl / High-Yield Fact**
Cold sterilization is particularly useful for medical devices that are sensitive to heat, such as certain plastics, fabrics, and biological tissues. This process is often used for sterilizing medical devices that are used in ophthalmology, neurosurgery, and other specialties where heat-sensitive devices are used.

**Correct Answer: D. Hydrogen peroxide gas plasma**