In Armenian, the first option says “immediately before the maneuver”, so it is wrong. A signal given with the indicator light is stopped immediately after the maneuver, which is the second option; only a hand signal is stopped before the maneuver starts.
Under the traffic rules, a maneuver signal given with the indicator light must be turned on before the maneuver starts and stopped immediately after it ends (clause 36).
Option 1. A signal is stopped immediately before the maneuver only when it is given by hand. In the Armenian original, this option says “immediately before the maneuver”, not “after”.
Option 3. The signal must continue throughout the maneuver, to keep the other drivers informed.