Step 1: Understanding the Question.
We need to know how much raw spirit an excise officer is allowed to draw as a sample.
Step 2: Key Approach.
Sampling rules for controlled substances like raw spirit are written to serve three separate purposes at once: the original test, a retest if needed, and a referee sample kept for disputes. A workable option must satisfy all three without withdrawing an excessive quantity.
Step 3: Detailed Explanation.
A single sample, whether 200 ml or 500 ml, only ever serves one test and leaves no separate portion for a retest or a referee check. Two samples of 150 ml each still cover only two of the three needs. Three samples of the same batch, each capped at 100 ml, is the only setup that gives one portion for testing, one for retesting, and one held back as a referee sample, while keeping the total quantity withdrawn reasonable.
Step 4: Final Answer.
The excise officer can withdraw three samples of the same batch, each not more than 100 ml.