109. Sonarpur

Communist Party of India (Marxist) held the seat; the winning margin narrowed from 49.1% to 30.7%.

• Won on a lower shareIts own vote share fell 3.4% — it held because the rest of the vote was more divided.
• New challengerICS (ICS) finished second with 34.6% — it did not contest here in 1977.
• Vote consolidatedThe top two candidates took 100.0% of the vote between them, up from 88.4% — a tighter two-way contest.

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