{:SHORTANSWER:=none~#correct~=na#correct~=n/a#correct~=N/A#correct~*#Sorry, try something else}
Steven, you are right, the / slash sign does not need to be escaped. I'm surprised that you say that if your students enter N/A they get it wrong!
Pierre, can you test that the following is right:
The only sign that needs to be escaped is the closing curly bracked }
The following signs must NOT be escaped: { # ~ /
Joseph
