Dear list,
I want to format some language tests that different people are preparing.
Each one uses different software and there are always problems in format
that i want to solve.

for a a/b/c questions I receive text that I will format to a list (comments
are mine)

In den Büchereien gibt es auch … %the question
… Kuchen. %option a
… Theater. %option b
… Workshops. %option c

I need to detect \par or whatever sign marks the newline character as an
argument delimiter so that I dont have to paste hundreds of times braces
for each argument.
For the example, I use this macro definition (which does no work!)

\long\def\prueba
#1\par#2\par#3\par#4ñ{\framed[frame=off,width=0.8\textwidth,corner=round,offset=1em,align=flushleft]%
{{\bf Beispiel}: #1\\
\qquad  a) #2\\
\qquad  b) {\bf #3}\\
\qquad  c) #4
}

I get: tex error on line 493 in file ./prueba.tex: The file ended when
scanning an argument.

the macro seems to  read to the end of file not detecting \par; I know its
the \par that causes the problem; I used ^^M also which I read is a sinonym
for return but it also does not work.

Help would be appreciated (my computer keyboard would appreciate it too...)