In a narrow unmarked road in which two cars cannot pass at the same time, which one has right of way?

Explanation
When a narrow stretch of road has no signage expressly regulating right of way, right of way is given to the vehicle that entered first. When it is not clear who entered first, right of way is given to the vehicle that has greater difficulty going in reverse.
Do you want to do the
official exams of the DGT?