Which of the following images shows a roasted duck? China Railway baffles online ticket buyers with impossible verification step
Frustrated users rolled out their own suggestions: which image shows the most handsome man? David Beckham or Leonardo Dicaprio?

China Railway has adopted a new verification system for booking tickets on its website, but the tricky questioning process has flummoxed most users, Chinese media reports.
After logging in their username and password, would-be travellers are presented with rows of images and must correctly match one with a listed word, according to the news website ThePaper.cn.
For example, which of the following shows a roasted duck (choose all):

But on many occasions, users are given multiple words. For instance, which of the following pictures depicts a salad or a sleeping bag (choose all)?

Confused? You are not alone. “The verification code ... has beaten out 99 per cent of its users,” one person commented online.