Which of the following is true about batch identifiers?

• A. All units in a batch share the same lot number and expiration date, but have different serial numbers
• B. All units in a batch share different lot numbers
• C. Each unit has a unique lot number
• D. Lot numbers and serial numbers are the same

Answer: (A)

In batch tracking, a batch (lot) groups products produced together under the same conditions. All units in that batch share the same lot number and the same expiration date, which enables batch-level recalls and shelf-life management. Each individual unit, however, can have its own unique serial number to allow item-level traceability. So the statement that fits best is that all units in a batch share the same lot number and expiration date, but have different serial numbers.

The other ideas conflict with how batching works: batches are not identified by different lot numbers within the same run; that would defeat the purpose of a batch. Likewise, each unit having its own unique lot number would mean there’s no batch grouping. Finally, lot numbers and serial numbers are distinct identifiers; they are not the same thing.