Third and fourth ventricles of the brain are connected by

Options

A. Aqueduct of sylvius
B. Foramen of mono
C. Foramen of magnum
D. Corpus callosum

Answer

**Step-by-Step Solution:**

1. **Understanding the Ventricles**: The brain contains a network of cavities known as ventricles that are filled with cerebrospinal fluid (CSF). These ventricles are part of the brain's ventricular system.

2. **Identifying the Ventricles**: The main ventricles in the brain include two lateral ventricles, the third ventricle, and the fourth ventricle.

3. **Connection Between Ventricles**: The question specifically asks about the connection between the third and fourth ventricles.

4. **Identifying the Connector**: The third and fourth ventricles are connected by a structure known as the aqueduct of Silvius, which is also referred to as the cerebral aqueduct.

5. **Conclusion**: Therefore, the third and fourth ventricles of the brain are connected by the aqueduct of Silvius.

**Final Answer**: The third and fourth ventricles are connected by the aqueduct of Silvius.

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