Definition: 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.
Input: Statement: The 1972 ABM Treaty permits the United States and Russia to deploy 100 interceptors to defend either a missile field or the national capital. Choices: 1. Interceptors are missiles that lock on to other missiles and blow them up. 2. The fear of ballistic missiles hitting Washington DC was great in 1972. 3. The 1971 ABM treaty regulates how many violins each country may have at a time.

1