An incorrectly matched options w.r.t. geological time period and corredponding horse fossil is

Options

A. Pleistocene - Equus
B. Miocene - Plioshippus
C. Oligocene - Mesohippus
D. Oligocene - Miohippus

Answer

To solve the question regarding the incorrectly matched options with respect to geological time periods and corresponding horse fossils, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the Geological Time Periods**:
- The geological time scale consists of various periods such as Oligocene, Miocene, and Pleistocene. Each period is associated with specific fossils.

2. **Analyze the First Option: Pleistocene and Aequus**:
- Aequus is a modern horse that existed during the Pleistocene period. This match is correct.

3. **Analyze the Second Option: Miocene and Pleohippus**:
- Pleohippus is a horse that existed during the Pleistocene, not the Miocene. Therefore, this match is incorrect.

4. **Analyze the Third Option: Oligocene and Mesohippus**:
- Mesohippus is a horse that did exist during the Oligocene period. This match is correct.

5. **Analyze the Fourth Option: Oligocene and Miohippus**:
- Miohippus is another name for Mesohippus and also existed during the Oligocene. This match is correct.

6. **Conclusion**:
- The only incorrect match is the second option: Miocene and Pleohippus. Therefore, the answer to the question is that the incorrectly matched option is the second one.

### Final Answer:
The incorrectly matched option with respect to geological time period and corresponding horse fossil is **Miocene and Pleohippus**.

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