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

Explanation

To solve the question, we need to identify the phylum where adults exhibit radial symmetry and larvae exhibit bilateral symmetry. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understand Symmetry**:
- Symmetry refers to the balanced distribution of duplicate body parts or shapes. There are two main types: radial symmetry and bilateral symmetry.
- Radial symmetry means the organism can be divided into similar halves around a central axis, while bilateral symmetry means the organism can be divided into two equal halves along a single plane.

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