Select the mismatched pair.

Options

A. Semicircular canals Internal ear
B. Corpus callosum -Cerebral hemispheres
C. Cranial nerves- Myelinated
D. Rhodopsin - Visual violet

Answer

To solve the question of selecting the mismatched pair from the given options, we will analyze each pair one by one.

### Step-by-Step Solution:

1. **Analyze the first option: Semicircular canals, Internal ear**
- The semicircular canals are indeed part of the internal ear. They are three fluid-filled structures that help in maintaining balance and spatial orientation.
- **Conclusion**: This pair is correctly matched.

2. **Analyze the second option: Corpus callosum, Cerebral hemispheres**
- The corpus callosum is a large bundle of nerve fibers that connects the left and right cerebral hemispheres. It is located beneath the cerebral cortex, not within the hemispheres themselves.
- **Conclusion**: This pair is mismatched.

3. **Analyze the third option: Cranial nerves, Myelinated**
- Cranial nerves can be myelinated, meaning they have a myelin sheath that aids in the rapid conduction of nerve impulses. This is true for many cranial nerves.
- **Conclusion**: This pair is correctly matched.

4. **Analyze the fourth option: Rhodopsin, Visual violet**
- Rhodopsin, also known as visual purple, is a light-sensitive protein found in the photoreceptor cells (rods) of the retina. This pair is also correctly matched.
- **Conclusion**: This pair is correctly matched.

### Final Conclusion:
The mismatched pair is **Corpus callosum, Cerebral hemispheres**.