9. Nautan

Indian National Congress held the seat; the winning margin narrowed from 32.8% to 11.0%.

• Won on a lower shareIts own vote share fell 35.4% — it held because the rest of the vote was more divided.
• New challengerCommunist Party of India (CPI) finished second with 18.0% — it did not contest here in 1977.
• Vote fragmentedThe top two took only 46.9% between them, down from 95.8% — the field split more ways.

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