**Core Concept**
The Preiz Nocard bacillus refers to a type of bacteria that belongs to the genus Nocardia. These bacteria are typically aerobic, Gram-positive actinomycetes that are commonly found in soil. They can cause infections in humans, particularly in immunocompromised individuals.

**Why the Correct Answer is Right**
The correct answer is known as the Preiz Nocard bacillus because it is a species of Nocardia that is often associated with human disease. Nocardia species are opportunistic pathogens that can cause a range of infections, including pulmonary and cutaneous infections. The Preiz Nocard bacillus, specifically Nocardia asteroides, is one of the most common species of Nocardia to cause disease in humans. This bacterium can invade healthy tissue and cause abscesses, granulomas, and other lesions.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a known species of Nocardia associated with human disease.
**Option B:** This option is incorrect because it is not a valid species of Nocardia.
**Option C:** This option is incorrect because it is a different type of bacterium altogether.

**Clinical Pearl / High-Yield Fact**
It's worth noting that Nocardia infections often occur in immunocompromised individuals, such as those with HIV/AIDS or taking immunosuppressive therapy. These infections can be difficult to diagnose and treat, and may require prolonged antibiotic therapy.

**Correct Answer:** C.