In the event of engine failure below V1, the first action to be taken by the pilot in order to decelerate the aeroplane is to:

1) Any acceleration in climb, with a constant power setting:

2) In unaccelerated climb:

3) Reduced take-off thrust should normally not be used when:

4) In the event of engine failure below V1, the first action to be taken by the pilot in order to decelerate the aeroplane is to:

5) "Maximum endurance":