The valve situated between the left atrium and left ventricle is called :
(1) Bicuspid valve
(2) Tricuspid valve
(3) Mitral valve
(4) Eustachian tube

Options

A. 1, 2 and 3 are correct
B. 1 and 2 are correct
C. 2 and 4 are correct
D. 1 and 3 are correct

Answer

To solve the question regarding the valve situated between the left atrium and left ventricle, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structures**: First, we need to identify the structures involved in the question. The left atrium receives oxygenated blood from the lungs, and the left ventricle pumps this blood to the rest of the body.

2. **Understand the Valves**: There are several valves in the heart, and we need to focus on the ones between the atria and ventricles:
- **Bicuspid Valve**: Also known as the mitral valve, it is located between the left atrium and left ventricle.
- **Tricuspid Valve**: This valve is located between the right atrium and right ventricle.
- **Eustachian Valve**: This is not a valve between the atria and ventricles; it is associated with the inferior vena cava.

3. **Evaluate the Options**:
- **Option (1) Bicuspid Valve**: This is correct as it is another name for the mitral valve.
- **Option (2) Tricuspid Valve**: This is incorrect as it is located between the right atrium and right ventricle.
- **Option (3) Mitral Valve**: This is also correct as it is another name for the bicuspid valve.
- **Option (4) Eustachian Tube**: This is incorrect as it is not a valve related to the atria and ventricles.

4. **Conclusion**: The correct answers are both the bicuspid valve and the mitral valve, which refer to the same structure. Therefore, the valve situated between the left atrium and left ventricle is correctly identified as either the bicuspid valve or the mitral valve.

### Final Answer:
The valve situated between the left atrium and left ventricle is called:
- (1) Bicuspid valve
- (3) Mitral valve