17. Nahan

Indian National Congress held the seat; the winning margin narrowed from 47.1% to 4.9%.

Boundaries were redrawn between 1951 and 1967 — the comparison is matched by name and is indicative only.

• Won on a lower shareIts own vote share fell 15.0% — it held because the rest of the vote was more divided.
• Vote consolidatedThe top two candidates took 100.0% of the vote between them, up from 87.8% — a tighter two-way contest.

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