Which of the following is true about the synaptic cleft ?

Options

A. It is the space present inside the pre-synaptic neuron .
B. It is the space present inside the post-synaptic neuron
C. It is the space separating the pre-and post-synaptic neurons.
D. It is the space present inside the synaptic vesicles.

Answer

**Step-by-Step Solution:**

1. **Understanding the Synaptic Cleft**: The synaptic cleft is a small gap that exists between two neurons at a synapse. It is crucial for the transmission of nerve impulses.

2. **Identifying the Options**: The question provides four options regarding the nature of the synaptic cleft:
- A) It is the space present inside the presynaptic neuron.
- B) It is the space present inside the postsynaptic neuron.
- C) It is the space separating the pre and postsynaptic neurons.
- D) It is the space present inside the synaptic vesicles.

3. **Analyzing Each Option**:
- Option A states that the synaptic cleft is inside the presynaptic neuron, which is incorrect. The cleft is not within the neuron but between them.
- Option B claims it is inside the postsynaptic neuron, which is also incorrect for the same reason.
- Option C correctly identifies the synaptic cleft as the space that separates the presynaptic neuron from the postsynaptic neuron.
- Option D suggests that it is inside the synaptic vesicles, which is incorrect. Synaptic vesicles contain neurotransmitters but are not the cleft itself.

4. **Conclusion**: The correct answer is Option C: "It is the space separating the pre and postsynaptic neurons." This accurately describes the function and location of the synaptic cleft.