Most primitive fossil of horse is

Options

A. equus
B. merychippus
C. mesohippus
D. eohippus

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for the most primitive fossil of a horse. To answer this, we need to look at the evolutionary history of horses.

2. **Identifying the Evolutionary Timeline**: The evolution of horses is traced back to the Eocene epoch. This is a crucial period in which the earliest ancestors of modern horses appeared.

3. **Listing the Early Horse Ancestors**: The evolutionary lineage of horses includes several key fossils:
- Eohippus (also known as Hyracotherium)
- Oligohippus
- Mericohippus
- Hipparion
- Equus (the modern horse)

4. **Determining the Most Primitive Fossil**: Among these, Eohippus is recognized as the most primitive fossil of the horse. It lived during the Eocene epoch and is considered the earliest known ancestor of modern horses.

5. **Conclusion**: Therefore, the most primitive fossil of the horse is **Eohippus**.

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