Question id 270 - Preflight Preparation - FAA PPL(A) - Private Pilot Airplane

Preflight Preparation - (Refer to figure 51) What should be entered into box 15 of the ICAO flight plan form?
Lowest planned altitude
Planned altitude for the first part of the route
Highest planned altitude

Training tests and timed exam simulations FAA PPL(A) - Private Pilot Airplane