Synthetic ThaiExam-style MCQ SFT shard for answer-format robustness and calibration.
Rows: 450
Latin 5-choice rows: 250, balanced 50 each for a/b/c/d/e
Thai 4-choice rows: 200, balanced 50 each for ก/ข/ค/ง
Latin non-e answers: 200, to counter end-option bias
Chat format: exactly user then assistant messages
Assistant behavior: concise Thai rationale plus final line คำตอบคือ (label)
Safety: original deterministic templates… See the full description on the dataset page:
https://huggingface.co/datasets/Jnx03/kanitakorn-thaiexam-v28-format-calibration-worker-d-20260614.
