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