Question 369 in the bank

Before you is traffic sign 303. Which traffic sign is sometimes placed before it?

Four red-bordered white triangles: 121 with three black arrows in a circle, 114 with a black X, 145 with two opposite black arrows, 122 with red, yellow, green dots; and blue circle 303 with three white circular arrows.
  1. 114
  2. 122
  3. Correct answer: 121
  4. 145

Why this is the answer

The correct answer in the official bank: 121

Sign 303 marks a roundabout where traffic must circulate around the island. It is sometimes preceded by warning sign 121, which alerts drivers in advance that a roundabout is coming, so they can slow down and prepare to enter it. Triangular warning signs are usually placed some distance before the hazard. The other options warn of an intersection, two-way traffic or traffic lights, not a roundabout.

Topic: Traffic signs. The bank marks it for these classes: Light truck (C1), Heavy truck (C), Bus (D), Motorcycle (A), Tractor (1), Private car (B).