Explanation:

- Option 1: The act must be done in good faith.

- A person acting under a public servant's direction must genuinely believe they are doing the right thing.

- Option 2: The direction was not strictly justifiable by law.

- The act under direction may not strictly adhere to the law, but if it's close to being justifiable, it still might not warrant a private defence.

- Option 3: The directed act has not generated reasonable apprehension of death.

- There should be no real fear of death or severe harm from the act.

- Option 4: All of the above.

- This option covers all necessary conditions before claiming no right of private defence.