var correctchoices=new Array()
correctchoices[1]='c'
correctchoices[2]='d'
correctchoices[3]='d'
correctchoices[4]='a'
correctchoices[5]='c'
correctchoices[6]='c'
correctchoices[7]='d'
correctchoices[8]='d'
correctchoices[9]='d'
correctchoices[10]='a'