In the statement "three are several ventricles in the brain and some of these ventricles are connected by foramen of morno. This foramen connects `underline(X)` which are located in the `underline(Y)` of the brain" , X and Y stand respectively for

Options

A. Lateral ventricles and cerebral hemisphere
B. Third and fourth ventricles in cerebral hemisphere and medulla oblongata
C. Lateral ventricles and third ventricles in cerebral hemisphere and mesencephalon
D. Lateral ventricles and third ventricle in cerebral hemispheres and diencephalon

Answer

To solve the question, we need to identify what X and Y represent in the context of the brain's ventricles and their connections.

### Step-by-Step Solution:

1. **Understanding the Foramen of Monroe**:
- The Foramen of Monroe, also known as the interventricular foramen, is a channel that connects the lateral ventricles of the brain to the third ventricle.

2. **Identifying X**:
- Since the Foramen of Monroe connects the lateral ventricles to the third ventricle, we can conclude that X represents both the lateral ventricles and the third ventricle. Thus, we can say:
- **X = Lateral Ventricle and Third Ventricle**.

3. **Identifying Y**:
- The lateral ventricles are located in the cerebral hemispheres, while the third ventricle is located in the diencephalon. Therefore, Y represents the part of the brain where these ventricles are located:
- **Y = Diencephalon**.

4. **Final Answer**:
- Therefore, the complete statement is: "X and Y stand respectively for Lateral Ventricle and Third Ventricle (X) located in Diencephalon (Y)".

### Summary:
- **X**: Lateral Ventricle and Third Ventricle
- **Y**: Diencephalon