SOP is the acronym for which of the following?

• A. Scientific Official Program
• B. Systematic Organized Procedures
• C. Study Operating Policies
• D. Standard Operating Procedure

Answer: (D)

Standard Operating Procedure is a formal, written instruction that describes exactly how a task should be done, step by step, who performs it, what equipment is used, and what safety and quality checks apply. In lab animal work, SOPs ensure consistency, proper animal welfare, and regulatory compliance by providing repeatable processes staff can be trained on and auditors can review. The other phrases listed are not the standard terms used in this context, so they are not what SOP stands for.