Teacher:In this task, you're given a statement and three sentences as choices. Your job is to determine the neutral choice based on your inference from the statement and your commonsense knowledge. The neutral choice is a sentence that neither agrees nor disagrees with the statement. Indicate your answer as '1', '2', or '3', corresponding to the choice number of the selected sentence. If sentence X agrees with sentence Y, one's correctness follows from the other one. If sentence X disagrees with sentence Y, they can not be correct at the same time.
Teacher: Now, understand the problem? Solve this instance: Statement: SCR is currently the predominant technology to be used for NOX control and is also the most demanding in terms of resources and time to install when compared to other NOx control technologies. Choices: 1. SCR is one of the best technologies for NOX control. 2. SCR has the shortest installation time, when compared to other similar technologies. 3. SCR takes a lot of time to install.
Student:
1