30. Sultan

Indian National Congress held the seat; the winning margin narrowed from 11.0% to 4.9%.

• Won on a lower shareIts own vote share fell 6.6% — it held because the rest of the vote was more divided.
• New challengerCommunist Party of India (Marxist) (CPM) finished second with 43.5% — it did not contest here in 1980.
• Vote fragmentedThe top two took only 91.8% between them, down from 98.9% — the field split more ways.

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