4. Bussy

Indian National Congress held the seat; the winning margin narrowed from 52.2% to 16.7%.

• Won on a lower shareIts own vote share fell 16.2% — it held because the rest of the vote was more divided.
• New challengerDravida Munnetra Kazhagam (DMK) finished second with 36.4% — it did not contest here in 1980.

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