cpQuizInfoAnswerChoice Returning Random Character

Both interactions can have a user variable associated. If the LMS is capable of retrieving those variables, which I do not know for Connect, it is OK.

You may be able to assign cpQuizAnswerChoice to another variable and then remove the "\" to display to the user.

I'm not sure if this would work in the script window or not, but if you create a variable, in the example below you would replace "yourNewVariable" with the variable you create, then display that variable on the results screen.

var str = window.cpAPIInerface.getVaraiableValue("cpQuizInfoAnswerChoice");
window.cpAPIInerface.setVaraiableValue( "yourNewVariable", replaceAllBackSlash( str ) )

function replaceAllBackSlash( targetStr )
{
    var index=targetStr.indexOf("\\");

    while(index >= 0)
{
        targetStr=targetStr.replace("\\","");
        index=targetStr.indexOf("\\");
    }

    return targetStr;
}

That will be an escape character, makes me think of JS. Personally I rarely use the FIB question slide because of some limitations, but use either the TEB, the Scrolling Text interaction or the Dropdown interaction to create a custom FIB slide.