I got below the average. That rarely happens, but with this one I feel more surprised than ashamed, honestly. Surprised by how common-knowledge some of these I'd never guess are.
I'm definitely not confusing it with Reichsmark. I grew up in West Germany and we called it D-mark or Deutschmark where I lived. Wikipedia wisdom of today notwithstanding.
The official name was Deutsche Mark. Deutschmark was an inofficial, colloquial name commonly used both in some parts of Germany as well as internationally.