The correct option is A Every
'Each' refers to the members of a group individually.
'Every' refers to all the members of a group of three or more individuals. It is used with a singular noun and verb.
'All' indicates each and every person connected / concerned. It is used with a plural noun and verb.
'None' indicates no one concerned / connected.
Here, we wish to denote that all the people (of a group) who appear for the exam do not pass. Therefore, the correct option is B: Every.