Explanation:

- Option 1: Specified areas

- The term "specified areas" usually refers to particular regions identified by law.

- Not applicable if legislation is meant for a whole country.

- Option 2: Whole of Pakistan

- Legislation that applies nationwide.

- The Probation of Offenders Ordinance, 1960 is designed to apply to the entire country rather than just parts of it.

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- Option 3: Tribal areas

- Typically refers to distinct regions with their own governance laws.

- The Ordinance is not limited to these regions.

- Option 4: None of above

- Used when none of the other options correctly describe the scope of the law.

- This doesn't apply here, as one of the options is correct.