Correct Option: 4 - All of Them

Explanation:

Section 163 of the Criminal Procedure Code (Cr. P.C.) prohibits certain actions during the investigation of an offense:

• Prohibition: A police officer or any person in authority (as defined under Section 24 of the Indian Evidence Act) cannot offer or make:
  1. Inducement: No offers to persuade someone to provide information.
  2. Threat: No intimidation to compel statements or evidence.
  3. Promise: No assurances of benefits for cooperation.
• Purpose: To ensure that any statement made by a person during an investigation is voluntary, truthful, and not influenced by external factors, maintaining the integrity of the judicial process.