Vitally confidential documents passing through the post should be enclosed in an envelope addressed to the intended recipient, and they should be

1. marked as strictly personal (by name)
2. marked as strictly private
3. marked as restricted
4. put into another envelope

Select the correct answer using the code given below.

According to standard administrative procedures and the Manual of Office Procedure (MOP) regarding the handling of classified or sensitive correspondence, highly confidential documents sent by post must follow specific security protocols:

• Double Enveloping: The document should be placed in an inner envelope, which is then placed inside an outer envelope (Statement 4). This prevents the contents or the classification from being visible if the outer cover is damaged.
• Marking: The inner envelope should be marked with the appropriate security classification and addressed to the recipient by name, often using terms like "Strictly Personal" or "Strictly Private" (Statements 1 and 2) to ensure it is opened only by the intended officer.
• Restricted: "Restricted" (Statement 3) is a specific security classification level. A "vitally confidential" document would likely be classified as "Secret" or "Top Secret"; marking it as "Restricted" would be an incorrect and lower classification.

Thus, statements 1, 2, and 4 are correct procedures.