A Type D plug in Democratic Republic of the Congo?
Yes — it seats, earth and all.
Democratic Republic of the Congo's Type C and Type E and Type D sockets accept a Type D plug (Old British 5 A (BS 546)). Both sides carry an earth, so grounded appliances keep their protection. The wall delivers 220 V at 50 Hz (198–242 V within tolerance) — if your device isn't rated for that (look for "100–240 V" on the brick), an adapter won't save it.
Grid facts verified against IEC World Plugs — Democratic Republic of the Congo. Physical-fit verdicts derive from pin geometry and each socket standard's acceptance list — not safety advice.