Which of the following is a correct statement ?

Options

A. Anode rays arise from anode ( so called)
B. Anode rays are also known as canal rays
C. The nature of anode rays depend upon the nature of gas in the discharge tube
D. All of these

Answer

To solve the question "Which of the following is a correct statement?", we need to analyze each of the provided statements regarding anode rays.

### Step-by-Step Solution:

1. **Understanding Anode Rays**:
- Anode rays are streams of positively charged particles that are produced in a gas discharge tube. They are generated when a gas is ionized and the positive ions move towards the cathode.

2. **Evaluating the First Statement**:
- The first statement claims that "anode rays arise from anode."
- This statement is correct. Anode rays do originate from the anode (the positive electrode) in a gas discharge tube, as demonstrated by experiments conducted by the German scientist Goldstein.

3. **Evaluating the Second Statement**:
- The second statement states that "anode rays are also known as canal rays."
- This statement is also correct. Anode rays are indeed referred to as canal rays because they pass through channels (or canals) in the cathode during the experiments.

4. **Evaluating the Third Statement**:
- The third statement asserts that "the nature of anode rays depends upon the nature of gas discharged through."
- This statement is correct as well. The characteristics of anode rays, such as their mass and charge, can vary depending on the type of gas used in the discharge tube.

5. **Conclusion**:
- Since all three statements are correct, the answer to the question is that all of the options provided are correct statements regarding anode rays.

### Final Answer:
All of the statements regarding anode rays are correct.

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