237. Dhanapur

Indian National Congress held the seat; the winning margin narrowed from 11.9% to 4.9%.

• Won on a lower shareIts own vote share fell 16.9% — it held because the rest of the vote was more divided.
• New challengerJanata Party (JNP) finished second with 24.9% — it polled just 0.4% in 1980.
• Vote fragmentedThe top two took only 54.7% between them, down from 81.4% — the field split more ways.

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