## **Core Concept**
The Chernico-parasitic theory, also known as the acidogenic-aciduric theory, explains the etiology of dental caries. This theory emphasizes the role of microorganisms in producing acid from fermentable carbohydrates, leading to tooth demineralization.

## **Why the Correct Answer is Right**
The Chernico-parasitic theory, proposed by W.D. Miller in 1890, suggests that dental caries is caused by acid production from the bacterial fermentation of dietary carbohydrates. This acid, primarily lactic acid, demineralizes tooth enamel, leading to caries. The theory implicates **Streptococcus mutans** and other acidogenic and aciduric bacteria as primary pathogens.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not correspond with any well-known figure associated with the Chernico-parasitic theory.
- **Option B:** This option is incorrect for similar reasons; there's no widely recognized association with the theory.
- **Option D:** This option is incorrect as it does not align with historical or scientific contributions to the Chernico-parasitic theory.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the **Chernico-parasitic theory** laid the foundation for modern caries prevention strategies, which include fluoride application, dietary counseling, and oral hygiene practices aimed at reducing **Streptococcus mutans** colonization and acid production.

## **Correct Answer:** C. W.D. Miller