The given figures `(A-D)` show four animals. Select the correct option with respect to a common characteristic of any two of these animals.

Options

A. a) A and D respire mainly through body wall
B. b) B and C show radial symmetry.
C. c) A and B have cnidoblasts for self-defence.
D. d) C and D have a true coelom.

Answer

D

Explanation

Figure `'C'` is of Octopus (mollusc) and figure `'D'` is of scorpion (arthropod). Both have true coeloms. Figure `A` is of tapeworm (platyhelminth) and Figure `B` is of Aurelia (cnidarian). Scorpion respires through book lungs. Octopus shows bilateral symmetry. Tapeworm does not have cnidoblasts for self-defence.