Which of the following is not true about " medulla oblongata"?

Options

A. It is a part of hindbrain
B. It is connected to spinal cord
C. It contains centre for control of respiration , gastric secretion and cardiovascular reflexes .
D. None of the above .

Answer

To determine which statement is not true about the medulla oblongata, we will analyze the provided options step by step.

### Step-by-Step Solution:

1. **Identify the Options**: We have four statements regarding the medulla oblongata. We need to evaluate each one to find the incorrect statement.

2. **Evaluate the First Statement**: "It is a part of hindbrain connected to spinal cord."
- **Analysis**: The medulla oblongata is indeed a part of the hindbrain and it connects to the spinal cord. This statement is true.

3. **Evaluate the Second Statement**: "It contains center for control of respiration."
- **Analysis**: The medulla oblongata contains centers that regulate vital functions, including respiration. This statement is also true.

4. **Evaluate the Third Statement**: "It contains center for gastric secretion and cardiovascular reflexes."
- **Analysis**: The medulla oblongata does have centers that control gastric secretion and cardiovascular reflexes. This statement is true as well.

5. **Evaluate the Fourth Statement**: "None of the above."
- **Analysis**: Since all the previous statements are true, this statement implies that there are no incorrect statements among the first three.

6. **Conclusion**: Since all the statements about the medulla oblongata are true, the statement that is not true is the fourth one: "None of the above."

### Final Answer:
The statement that is not true about the medulla oblongata is: **"None of the above."**