27. Siwan

Bharatiya Jana Sangh held the seat; the winning margin narrowed from 13.6% to 7.2%.

• Won on a lower shareIts own vote share fell 4.9% — it held because the rest of the vote was more divided.
• Multi-cornered4 candidates cleared 5% — a genuinely multi-cornered fight.

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