10. Irikkur

Communist Party of India (Marxist) held the seat; the winning margin narrowed from 30.9% to 2.8%.

• Won on a lower shareIts own vote share fell 16.8% — it held because the rest of the vote was more divided.
• New challengerRashtriya Sarvajan Party (RSP) finished second with 45.9% — it did not contest here in 1967.
• Vote fragmentedThe top two took only 94.5% between them, down from 100.0% — the field split more ways.

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