Lying silently on the operation table, my husband was still worried about me. Even in such a(n) ______ state as he was then, his thought still went to me.
A. terrible B. important

The answer given is B.

Does "important" mean the same as "critical or serious"? Is it a natural collocation as "He was in an important state"?

Why is A wrong, since he was in a terrible state.

Thanks for your help!