Given the task definition and input, reply with output. 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: .1,3 Often a single absorber will serve multiple boilers and reduce much of the steel that would be required if absorbers had been fed by individual boilers. Choices: 1. Never will a single absorber serve multiple boilers 2. Often a single absorber will be the most expensive part of a boiler 3. Often a single absorber will serve multiple boilers
1