Question: When were the last of the six great north faces of the Alps climbed?

Is Edward Whymper reached the top of the Matterhorn in 1865 (after seven attempts), and in 1938 the last of the six great north faces of the Alps was climbed with the first ascent of the Eiger Nordwand (north face of the Eiger). a good answer to this question?

Possible answers:
[A]. yes;
[B]. no;
[A].