Medusa of Obelia is

Options

A. Carnivorous
B. Herbivorous
C. Detritus feeder
D. Omnivorous.

Answer

### Step-by-Step Solution:

1. **Identify the Organism**:
- The organism in question is Obelia, which belongs to the phylum Cnidaria.

2. **Understand the Forms of Obelia**:
- Obelia has two reproductive forms: the polyp and the medusa. The question specifically asks about the medusa form.

3. **Feeding Habits of Medusa**:
- The medusa form of Obelia is carnivorous, meaning it primarily feeds on other organisms, such as insects and worms.

4. **Digestion Process**:
- The digestion in the medusa form is both intracellular (within the cells) and extracellular (outside the cells), which is typical for carnivorous organisms.

5. **Evaluate Options**:
- **Option 1: Carnivores** - This is correct, as the medusa feeds on animal matter.
- **Option 2: Herbivores** - This is incorrect because herbivores feed on plants, and the medusa does not.
- **Option 3: Detritus feeders** - This is also incorrect; detritus feeders consume dead organic matter, which does not apply to the medusa.
- **Option 4: Omnivores** - This is incorrect as well; omnivores eat both plant and animal matter, but the medusa specifically feeds on animals.

6. **Conclusion**:
- The correct answer is that the medusa of Obelia is a carnivore.