5. Delhi Cantonment

Indian National Congress held the seat; the winning margin narrowed from 49.7% to 3.1%.

Boundaries were redrawn between 1972 and 1977 — the comparison is matched by name and is indicative only.

• Won on a lower shareIts own vote share fell 31.9% — it held because the rest of the vote was more divided.
• New challengerJanata Party (JNP) finished second with 39.8% — it did not contest here in 1972.
• Vote fragmentedThe top two took only 82.7% between them, down from 100.0% — the field split more ways.

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