7. Bettiah

Indian National Congress held the seat; the winning margin narrowed from 57.9% to 0.6%.

• Won on a lower shareIts own vote share fell 34.5% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 72.7% between them, down from 84.3% — the field split more ways.

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