Perhaps the question means “what is the best weapon for a beginner to start with?
Foil is the most common starter weapon, and its skills translate most easily to the other weapons. Sabre is less ideal for students planning to try other weapons, due to the higher cost of electric sabre gear, and the reduced use of the point. Fencers who begin with epee may struggle with the concept of right-of-way if they attempt to learn a second weapon later. However, if the student is certain that they will stick with sabre or epee, then there is no harm to starting with those weapons immediately.