On a provincial road you pass, in short succession: a round 'C1 closed in both directions' sign and, a hundred metres further, the round overtaking-ban sign. A passenger says: 'So those are two C-signs.' Is that correct?
Yes — both are round with a red border, so both are category C
No — only the first is category C; the overtaking ban is category F
No — neither is category C, because both are actually category F
Explanation
False — trap: overcorrection. The first sign ('C1 closed in both directions') is indeed in chapter C of appendix 1; only the overtaking ban is in chapter F. (VekaBest p.47-48 (Hoofdstuk 3 §3.1 Verkeersborden — Categorieën verkeersborden))