3. Dr. Radhakrishnan Nagar

All India Anna Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 21.3% to 10.8%.

• Won on a lower shareIts own vote share fell 8.1% — it held because the rest of the vote was more divided.
• New challengerIndian National Congress (INC) finished second with 39.6% — it did not contest here in 2001.
• Vote fragmentedThe top two took only 89.9% between them, down from 95.5% — the field split more ways.

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