Explanation:

Correct Option: 4 - all of them

Section 144 of the Criminal Procedure Code (Cr. P.C.) provides the power to issue directions in cases where there is a potential threat to public peace, safety, or order. The section allows authorities to take preventive measures in the following situations:

• Obstruction, annoyance, or injury to any person lawfully employed.
• Danger to human life, health, or safety.
• Disturbance of the public tranquility, or a riot or an affray.

Thus, the correct answer is "all of them", as Section 144 can be invoked to prevent any of these conditions.