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