26. Tirunallar

Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 13.6% to 3.6%.

Boundaries were redrawn between 1974 and 1977 — the comparison is matched by name and is indicative only.

• Won on a lower shareIts own vote share fell 15.3% — it held because the rest of the vote was more divided.
• Runner-up changedSecond place passed from NCO (NCO) to All India Anna Dravida Munnetra Kazhagam (AIADMK).
• Vote fragmentedThe top two took only 64.5% between them, down from 85.0% — the field split more ways.

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