Among the following places, where is stopping prohibited?

Correct answer: On road sections affected by the "Tunnel" sign.

You must not stop on a section covered by a tunnel sign, like the one in the image. Stopping on a curve is prohibited when visibility is reduced. At an intersection, it is prohibited if you make turning difficult or, on a road outside a built-up area, block visibility and create a hazard.

Real Decreto 1428/2003, de 21 de noviembre, por el que se aprueba el Reglamento General de Circulación