Who is the alpha in teen wolf?

Well the question has narrowed down to :-

1) Vet

2) Stiles

3) Coach

4) Chemistry teacher

Well the vet is the obvious choice, Stiles will be a shock, chemistry teacher is the conventional choice, as per any whodunit protocol.

So Coach is the one.

I personally think its the Coach. But the Show Writers are just so clever. They might change it. But if they change it, do you know, who it will be?

: ) I have a theory,even for that but lets see.