Solvent is polar protic which will favour E1. Also base here is not that strong like t-buok-. So the safe bet here is 1.
If the reagent was ro-/dmso it would be 2.
Note those who are talking about saytzeff/hofmann you have got the wrong concept.Here there is no need of that. The definition of saytzeff was something else, it is used when there is a secondary carbon, here the alpha carbon is primary.