5. Badarpur

Indian National Congress held the seat; the winning margin narrowed from 43.7% to 7.1%.

• Won on a lower shareIts own vote share fell 28.4% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 74.7% between them, down from 94.9% — the field split more ways.

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