Which document records the location and identification of retained body fluids/tissue samples if assays need to be repeated?

• A. Treatment Allocation and Decoding Documentations
• B. Record of Retained body Fluids/Tissue Samples (If Any)
• C. Audit Certificate (if available)
• D. Final Report by Investigator to IRB/IEC Where Required

Answer: (B)

When handling biological samples in a trial, it’s essential to have a clear record of any materials kept for potential future testing. This keeps everything traceable, accountable, and compliant with how specimens are stored and used. The document named Record of Retained body Fluids/Tissue Samples (If Any) is specifically the place where you record what samples exist, who they belong to, what identifiers are used, where they’re stored, and under what conditions they may be accessed or reanalyzed. This makes it possible to locate and identify the exact sample if an assay needs to be repeated, rechecked, or validated.

The other documents serve different purposes: one relates to how treatment groups are assigned and kept blind, another is an audit certificate from an external check, and the last is the investigator’s final reporting to the ethics committee. None of these are the formal record used to track retained biospecimens, which is why this document is the correct choice.