Which of the following animals have different symmetry in comparison to the other three?

Step-by-step solution

Types of animals on the basis of symmetry - A. Asymmetrical - No particular symmetry. Examples - Most of the sponges B. Radially symmetrical - When any plane passing through the central axis of the body divides the organism into 2 equal halves. Examples - Few sponges, coelenterates, ctenophores and adult echinoderms. C. Bilaterally symmetrical - If the body of an organism is divisible into 2 equal halves only in one plane. Examples - Platyhelminthes, aschelminthes, annelids, arthropods, molluscs, the larva of echin