**Core Concept**
Sterilization of disposable syringes is crucial to prevent the transmission of infectious diseases. Autoclaving and dry heat sterilization are commonly used methods, but they are not suitable for disposable syringes due to their material properties. Ethylene oxide (EtO) gas sterilization is a widely accepted method for sterilizing heat-sensitive medical devices, including disposable syringes.

**Why the Correct Answer is Right**
EtO gas sterilization involves the use of ethylene oxide, a potent bactericidal and sporicidal agent. The gas penetrates the syringe material, inactivating microorganisms within the device. The process is suitable for heat-sensitive materials, such as plastics and elastomers, which are commonly used in disposable syringes. EtO gas sterilization is a reliable method for ensuring the sterility of disposable syringes.

**Why Each Wrong Option is Incorrect**
**Option A:** Autoclaving is not suitable for disposable syringes due to the high temperatures and steam required, which can cause damage to the plastic materials.
**Option B:** Dry heat sterilization is also not suitable for disposable syringes, as the high temperatures required can cause degradation of the plastic materials.
**Option C:** Gamma radiation sterilization is not commonly used for disposable syringes due to the potential for radiation-induced degradation of the plastic materials.

**Clinical Pearl / High-Yield Fact**
EtO gas sterilization is a widely accepted method for sterilizing heat-sensitive medical devices, including disposable syringes. It is essential to ensure that the syringes are properly packaged and processed to prevent exposure to EtO gas, which can be hazardous to human health.

**Correct Answer: C. Gamma radiation sterilization is not commonly used for disposable syringes due to the potential for radiation-induced degradation of the plastic materials.