A:10,5,32,6,7,9,17,24,4
B:10,5,32,6,7,9,4,17,24
C:10,5,32,4,6,7,9,17,24
D:4,10,5,32,6,7, 9,17,24
下列动物身体呈辐射对称,且有口无肛门的是( )