12. Champhai

Independent held the seat; the winning margin narrowed from 10.0% to 1.3%.

Boundaries were redrawn between 1972 and 1978 — the comparison is matched by name and is indicative only.

• Won on a lower shareIts own vote share fell 14.3% — it held because the rest of the vote was more divided.
• New challengerPPC (PPC) finished second with 33.8% — it did not contest here in 1972.
• Vote fragmentedThe top two took only 68.9% between them, down from 88.7% — the field split more ways.

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