Well, yes, I might have said that myself if pushed for time- because for the first 50 years of my life it would have been the right answer.
As it was, I reached for my mental abacus and moved the beads around a bit. A hundred years ago was 1916- slap bang in the middle of the Great War- and so the king was-
But George V was king when my parents were born.
How time flies.