7. Cooch Behar South

Indian National Congress held the seat; the winning margin widened from 8.9% to 13.3%.

• Won on a lower shareIts own vote share fell 10.4% — it held because the rest of the vote was more divided.
• New challengerCommunist Party of India (Marxist) (CPM) finished second with 30.3% — it did not contest here in 1969.
• Vote fragmentedThe top two took only 73.8% between them, down from 99.0% — the field split more ways.

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