**Core Concept**
Samuel Hahnemann was a German physician who laid the foundation for a holistic approach to medicine, emphasizing the law of similars and the concept of homeopathy. This philosophy revolutionized the way physicians understood the treatment of diseases, shifting focus from symptom suppression to addressing the underlying causes.

**Why the Correct Answer is Right**
Hahnemann's work on the law of similars, which states that "like cures like," led to the development of homeopathy. He believed that a substance that causes symptoms in a healthy individual could be used to treat similar symptoms in a patient. This concept is based on the principle of isopathy, where a patient is treated with a highly diluted substance that mimics the symptoms of the disease. Hahnemann's work on homeopathy emphasized the importance of individualized treatment and the use of natural substances.

**Why Each Wrong Option is Incorrect**
**Option A:** While Hahnemann was a physician, he is not primarily known for his work in pharmacology.
**Option B:** Although Hahnemann was a pioneer in medical thought, he is not credited with the discovery of the germ theory of disease.
**Option C:** Hahnemann's work on homeopathy was not focused on the development of conventional medicine.

**Clinical Pearl / High-Yield Fact**
Samuel Hahnemann's concept of the law of similars remains a fundamental principle in homeopathy, emphasizing the importance of treating the whole person, not just the symptoms.

**Correct Answer:** C. Hahnemann is referred to as the Founding Father of Homeopathy.