Select the odd one w.r.t. basis of classification of kingdom fungi.

Options

A. Formation of fruiting bodies
B. Mode of spore formation
C. Composition of cell wall
D. Morphology of the mycelium

Answer

To solve the question of selecting the odd one with respect to the basis of classification of the kingdom Fungi, we will analyze the provided options step by step.

### Step 1: Understand the Basis of Classification in Fungi
Fungi are classified based on several criteria, including:
- Formation of fruiting bodies
- Mode of spore formation
- Morphology of mycelium

### Step 2: Analyze Each Option
1. **Formation of Fruiting Bodies**: This is a significant criterion for classification. Different types of fruiting bodies like apothecium and perithecium are used to classify fungi.

2. **Mode of Spore Formation**: This is another important classification criterion. Different fungi produce different types of spores, such as ascospores in Ascomycetes and basidiospores in Basidiomycetes.

3. **Composition of Cell Wall**: The cell wall of fungi is primarily composed of chitin, which is consistent across most fungi. This characteristic does not vary significantly among different fungal groups, making it less useful for classification purposes.

4. **Morphology of Mycelium**: The structure of mycelium, whether septate or non-septate, is also a basis for classification in fungi.

### Step 3: Identify the Odd One Out
From the analysis:
- The first, second, and fourth options (formation of fruiting bodies, mode of spore formation, and morphology of mycelium) are valid bases for classification as they exhibit significant diversity among different fungal groups.
- The third option (composition of cell wall) is more uniform across fungi and does not serve as a strong basis for classification.

### Conclusion
The odd one out with respect to the basis of classification of kingdom Fungi is **the composition of the cell wall**.

### Final Answer
**The odd one is the composition of cell wall.**

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