6. Karimganj South

Indian National Congress held the seat; the winning margin widened from 7.9% to 10.6%.

• Won on a lower shareIts own vote share fell 17.0% — it held because the rest of the vote was more divided.
• New challengerCommunist Party of India (CPI) finished second with 24.8% — it did not contest here in 1957.
• Vote fragmentedThe top two took only 60.3% between them, down from 97.1% — the field split more ways.

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