Time zones: How many hours is Central time behind Eastern time

Is it 3?

central is only one hour behind eastern time

EDIT::
yes, it is. daylight savings (CDT and EDT) moves all time zones one hour forward, standard time (CST and EST) moves all time zones one hour back. the time zones are always the same time increment apart--for eastern and central, that is *always* one hour apart. always.

1, yes

One or two hours

One hour