21. Nangloi

Indian National Congress held the seat; the winning margin narrowed from 43.3% to 29.0%.

Boundaries were redrawn between 1951 and 1972 — the comparison is matched by name and is indicative only.

• Won on a lower shareIts own vote share fell 13.6% — it held because the rest of the vote was more divided.
• New challengerBharatiya Jana Sangh (BJS) finished second with 26.6% — it did not contest here in 1951.
• Vote fragmentedThe top two took only 82.3% between them, down from 95.2% — the field split more ways.

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