On the ring road near Enschede you see a yellow diamond-shaped sign. Which appendix-1 category does this belong to?
Category B — priority
Category J — warning, because every diamond is a warning sign
Category A — speed
Explanation
False — trap: shape confused with another category. Warning signs (J) are triangles; the yellow diamond is unique to category B. (VekaBest p.47-48 (Hoofdstuk 3 §3.1 Verkeersborden — Categorieën verkeersborden))