Name the phylum in which adults exhibit radial symmetry and larva exhibit bilateral symmetry.

Explanation

To answer the question regarding the phylum in which adults exhibit radial symmetry and larvae exhibit bilateral symmetry, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Symmetry Types**:
- Radial symmetry means that the body can be divided into similar halves by multiple planes passing through the central axis. An example of this is a starfish.
- Bilateral symmetry means that the body can be divided into two equal halves along one plane. This is typical of many animals, including humans.

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