**Core Concept**
Autoclaving is a method of sterilization that uses high pressure and temperature to kill microorganisms. The chamber condition required for autoclaving involves a specific temperature and time combination to achieve effective sterilization.

**Why the Correct Answer is Right**
The correct answer is 121°C for 15 minutes, which is the standard condition for autoclaving. This temperature and time combination is sufficient to achieve the required 121°C for 15 minutes to kill all forms of microbial life, including bacterial spores. The steam penetration into the chamber ensures that all surfaces are exposed to the high temperature, thereby achieving effective sterilization.

**Why Each Wrong Option is Incorrect**
**Option A:** 121°C for 30 minutes is excessive, as the recommended time is 15 minutes.
**Option B:** 134°C for 3 minutes is incorrect because the temperature is too high and the time is too short for effective sterilization.
**Option C:** 121°C for 1 minute is insufficient, as the recommended time is 15 minutes to ensure complete sterilization.

**Clinical Pearl / High-Yield Fact**
To ensure effective autoclaving, it's essential to maintain a temperature of 121°C for 15 minutes. This can be achieved by using a pressure cooker or a steam autoclave, and verifying the temperature and pressure using a thermometer and a pressure gauge.

**Correct Answer:** C. 121°C for 15 minutes