72. Sitamarhi North

Indian National Congress held the seat; the winning margin narrowed from 15.4% to 3.6%.

• Won on a lower shareIts own vote share fell 11.0% — it held because the rest of the vote was more divided.
• New challengerSOC (SOC) finished second with 24.3% — it did not contest here in 1957.
• Vote fragmentedThe top two took only 52.2% between them, down from 62.3% — the field split more ways.

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