Q: 69 (CDS-I/2002)

Consider the following statements regarding different types of animals:
1. Cnidarians are acoelomate
2. All sponges (Porifera) are marineare marine
3. Flatworms (Platyhelminthes) can produce asexually
4. In arthropods, fertilisation is always internal.
Which of these statements is/are correct?
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