Explanation:

- Some people believe that discipline means blind submission to authority.

- This is a straightforward, present tense statement.

- Option 1: It is belief by some people that discipline means blind submission to authority.

- Grammatically incorrect due to "is belief" instead of "is a belief."

- Option 2: It was believed by some people that discipline meant blind submission to authority.

- Uses past tense, indicating a belief held previously.

- Option 3: It is believed by some people that discipline means blind submission to authority.

- Uses present tense, indicating an ongoing belief.

- Option 4: It has been believed by some people that discipline means blind submission to authority.

- Uses present perfect tense, indicating a belief that started in the past and continues now.

- Correct Answer: Option 3

- "It is believed by some people that discipline means blind submission to authority" is correct as it reflects an ongoing belief.