Step 1: Recall what GMP covers.
Good Manufacturing Practice (GMP) is a system for ensuring that products are consistently produced and controlled according to quality standards. GMP covers people, premises, equipment, documentation, production, and quality control within a manufacturing facility.
Step 2: Check each option.
Personnel hygiene is a clear GMP requirement to prevent contamination. Documentation is central to GMP (batch records, SOPs). Equipment validation is essential for GMP compliance.
Step 3: Identify the odd one out.
A clinical trial protocol is part of Good Clinical Practice (GCP), not GMP. Clinical trials happen before a product is manufactured for market. GMP applies to the manufacturing stage, while GCP applies to the clinical research stage.
Step 4: Confirm with logic.
GMP is about the factory and manufacturing process. Clinical trial protocols govern how a drug is tested in human subjects. These are two distinct regulatory domains with different guidelines.
Step 5: Conclusion.
Of the four options, clinical trial protocol is NOT part of GMP because it belongs to the GCP domain.
Answer: Option (3) — Clinical trial protocol