See the multi-choice question below:

Sentence 1: The sickening anxiety, forgotten for a while in the excitement of knowing Jane Finn was found at last, swept over him again.

Sentence 2: For a moment the sickening anxiety had disappeared, but soon came back.

If the first sentence is true, then is the second sentence true?
Possible answers:
(I). yes;
(II). it is not possible to tell;
(III). no;
(I).