Which statatement is not true ?

Options

A. In the spinal cord, the white matter contains the axons conducting information up and down the spinal cord.
B. The limbic system is involved in basic physiological drives, instincts and emotions.
C. The vast majority of the nerve cell bodies in the human nervous system are contained with in the limbic system.
D. In human a part of limbic system is necessary for the transfer of short-term memory to long-term memory.

Answer

To determine which statement is not true, we will analyze each statement provided in the options.

### Step-by-Step Solution:

1. **Analyze the First Statement**:
- The statement claims that the white matter in the spinal cord contains axons that conduct information up and down the spinal cord.
- **True**: This statement is correct because white matter is primarily composed of myelinated axons that facilitate communication between different parts of the nervous system.

2. **Analyze the Second Statement**:
- The statement asserts that the limbic system is involved in basic physiological drives, instincts, and emotions.
- **True**: This statement is also correct. The limbic system plays a crucial role in regulating emotions and drives.

3. **Analyze the Third Statement**:
- The statement suggests that the vast majority of nerve cell bodies in the human nervous system are contained in the limbic system.
- **False**: This statement is incorrect. While the limbic system contains important structures, the majority of nerve cell bodies are found in the cerebral cortex and other regions of the brain.

4. **Analyze the Fourth Statement**:
- The statement claims that a part of the limbic system is necessary for the transfer of short-term memory to long-term memory.
- **False**: This statement is misleading. The hippocampus, which is part of the limbic system, is indeed involved in memory processing, but it is more accurate to say that the hippocampus is crucial for the formation of new long-term memories rather than just being a part of the limbic system.

### Conclusion:
The statement that is **not true** is the third statement: "The vast majority of the nerve cell bodies in the human nervous system are contained in the limbic system."