In Annelids formation of larva is usually absent but when present the larva is called :

Options

A. Tadpole
B. Planula
C. Trochophore
D. Ephyra

Answer

To answer the question about the larval stage in Annelids, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the type of larva that may be present in Annelids, even though larval formation is usually absent in this group.

2. **Identify the Options**: The options provided are:
- Option 1: Ifaria
- Option 2: Planula
- Option 3: Trochophore
- Option 4: Tadpole

3. **Evaluate Each Option**:
- **Option 1: Ifaria** - This is incorrect because Ifaria is not a recognized larval form associated with Annelids.
- **Option 2: Planula** - This is also incorrect as Planula is a larval stage of jellyfish, not Annelids.
- **Option 3: Trochophore** - This is the correct answer. Trochophore larva is indeed associated with some Annelids when larval formation occurs.
- **Option 4: Tadpole** - This is incorrect because Tadpole is the larval stage of amphibians, not Annelids.

4. **Conclusion**: The correct answer is **Trochophore**, which is the larval form that can be present in some Annelids.

### Final Answer:
The larva that is present in Annelids, when formation occurs, is called **Trochophore**.

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