**Core Concept**
The anti-rabies vaccine is a crucial tool in preventing rabies, a fatal viral disease transmitted primarily through the saliva of infected animals. The vaccine is derived from a specific strain of the rabies virus, which has been attenuated to minimize its virulence while maintaining its immunogenicity.

**Why the Correct Answer is Right**
The anti-rabies vaccine is prepared from the Fixed Viruses of Louis Pasteur (PV), which were developed by Louis Pasteur in the 19th century. These viruses are grown in rabbits and then attenuated to create a safe and effective vaccine. The PV strain is still used today due to its excellent immunogenicity and efficacy in preventing rabies. The vaccine works by stimulating the production of antibodies against the rabies virus, which helps to neutralize the virus and prevent it from causing disease.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the correct strain of the rabies virus used in the vaccine.
* **Option B:** This option is incorrect because it does not accurately describe the method of preparation of the anti-rabies vaccine.
* **Option C:** This option is incorrect because it is not a recognized strain of the rabies virus used in the vaccine.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the anti-rabies vaccine should be administered promptly after exposure to the virus, ideally within 48-72 hours, to be most effective. Delayed vaccination can still be effective, but it may not provide complete protection.

**Correct Answer:** C.