Definition: In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.
Input: Statement: There is a super-dense class, still smaller, poorer in hydrogen, than the inner planets of the solar system. Choices:  1. The inner planets are bigger than them. 2. The super dense class is full of hydrogen. 3. The super dense planets have a different kind of structure.

2