8. Bettiah

Indian National Congress held the seat; the winning margin narrowed from 17.8% to 3.1%.

• Won on a lower shareIts own vote share fell 20.9% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 65.0% between them, down from 92.0% — the field split more ways.

Written from the constituency figures by a fixed set of rules — no language model.