You will be given a definition of a task first, then some input of the task.
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.

Statement: However, these lakes remain susceptible to becoming chronically acidic if acid deposition increases. Choices: 1. And increase in acid deposition increase cannot end in chronic acidity. 2. Acid deposition could make these lakes susceptible to becoming chronically acidic. 3. Chronic acidity can kill fish stocks and promote algae growth.
Output:
1