请找出下列每组单词中不是同一类的词。
( )(1)A. monkey B. scarf C. bag D. purse
( )(2)A. cake B. milk C. bread D. biscuits
( )(3)A. circle B. square C. apple D. rectangle
( )(4)A. this B. these C. flag D. those
( )(5)A. mother B. father C. banana D. brother