Limax is a

Options

A. Plano-convex mollusc
B. Naked gastropod with external shell
C. Gastropod with wxternal shell
D. Amphilbious gastropod.

Answer

To answer the question "Limax is a", we will analyze the options provided and determine the correct classification of Limax based on its characteristics.

### Step-by-Step Solution:

1. **Identify the Phylum**: Limax belongs to the phylum Mollusca. Mollusca is known for its diverse group of organisms, which are triploblastic and have a coelom.

**Hint**: Remember that Limax is part of a larger group known for its diversity and body structure.

2. **Classify Limax**: Within the phylum Mollusca, Limax is classified under the class Gastropoda. Gastropods are characterized by their unique body plan which includes a single, usually spiraled shell or, in some cases, no shell at all.

**Hint**: Think about the characteristics of gastropods and how they differ from other mollusks.

3. **Identify the Type of Limax**: Limax is specifically a genus of air-breathing land slugs. This means it is a terrestrial mollusk that has adapted to live on land rather than in water.

**Hint**: Consider the habitat of Limax and how it breathes.

4. **Determine Amphibious Nature**: Limax is considered to be partially amphibious, meaning it can live both on land and in moist environments. This characteristic is important in classifying it as an amphibious gastropod.

**Hint**: Think about the meaning of "amphibious" and how it relates to the habitat of Limax.

5. **Evaluate the Options**: Now, let's evaluate the options given:
- Planoconvex mollusk: Incorrect, as this does not describe Limax.
- Naked gastropod with external shell: Incorrect, as Limax does not have an external shell.
- Gastropod with external shell: Incorrect, as Limax is a slug and lacks a prominent external shell.
- Amphibious gastropod: Correct, as Limax is a land slug that can thrive in moist environments.

**Hint**: Compare the characteristics of Limax with each option to find the best match.

### Final Answer:
The correct classification for Limax is **amphibious gastropod**.