10. Kalchini

Indian National Congress held the seat; the winning margin narrowed from 27.5% to 7.0%.

• Won on a lower shareIts own vote share fell 24.4% — it held because the rest of the vote was more divided.
• New challengerPraja Socialist Party (PSP) finished second with 31.7% — it did not contest here in 1969.
• Vote fragmentedThe top two took only 70.5% between them, down from 98.8% — the field split more ways.

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