Select the incorrect statement with respect to the neurons and brain .

Options

A. Efferent neurons Carry impulse from CNS to peripheral tissues .
B. Granular bodies are found in cytons of neuron.
C. Unipolar neuron has only dendrite .
D. Duramater is in contact with cranium.

Answer

To solve the question, we need to evaluate each statement regarding neurons and the brain to identify the incorrect one.

### Step-by-Step Solution:

1. **Evaluate the First Statement**:
- The statement claims that "efferent neurons carry impulse from the central nervous system to the peripheral tissues."
- **Analysis**: This is true. Efferent neurons, also known as motor neurons, transmit signals from the central nervous system (CNS) to effectors (muscles or glands) in the peripheral tissues.

**Hint**: Remember the function of efferent neurons in the nervous system.

2. **Evaluate the Second Statement**:
- The statement mentions that "the granular bodies are found in the cytons of the neurons."
- **Analysis**: This is also true. The granular bodies, or Nissl bodies, are found in the cell body (soma or cyton) of neurons and are involved in protein synthesis.

**Hint**: Consider the structure of neurons and where protein synthesis occurs.

3. **Evaluate the Third Statement**:
- The statement asserts that "the unipolar neurons have only one dendrite."
- **Analysis**: This is incorrect. Unipolar neurons have one axon and no true dendrites; they have a single process that extends from the cell body, which branches into two parts (one going to the periphery and one to the CNS).

**Hint**: Recall the characteristics of unipolar neurons and their structure.

4. **Evaluate the Fourth Statement**:
- The statement states that "the durameter is in contact with the cranium."
- **Analysis**: This is true. The dura mater is the outermost layer of the meninges and is in direct contact with the skull (cranium).

**Hint**: Think about the layers of the meninges and their relationship with the skull and brain.

### Conclusion:
After evaluating all statements, the incorrect statement is the third one, which claims that unipolar neurons have only one dendrite. Therefore, the answer to the question is:

**Answer**: The third statement is incorrect.