What the meaning of the word incongruous in the excerpt below hence although I had now two characters, as well as two appearances one was wholly evil and the other, was still the old Henry Jekyll that incongruous compound of whose reformation and improvement I had already learned to despair the movement was thus wholly toward the worse.
a. capable of containing a great deal
b. not harmonious; incompatible
c. occurring in great variety; diverse
d. persistent; enduring