select the odd one w.r.t. members of class 'Pteropsida'.

Options

A. dryopteris
B. pteris
C. Adiantum
D. selaginella

Answer

To solve the question of selecting the odd one out with respect to members of the class 'Pteropsida', we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Class Pteropsida**:
- Pteropsida is a class of plants that includes ferns and their relatives. Members of this class are characterized by the presence of vascular tissue and reproduce via spores.

2. **Identify Common Characteristics of Pteropsida**:
- Members typically have rhizomes (underground stems).
- They may have small or compound leaves.
- Nodes and internodes are variable.
- Sporangia (structures producing spores) are often found on the leaves or in sori (clusters).

3. **List the Given Options**:
- The question implies there are four members to choose from, but only three specific members of the class 'Teropsida' are mentioned: Diopteris, Teres, and Adiantum.
- The fourth member mentioned is 'Cella genela'.

4. **Determine the Classification of Each Member**:
- Diopteris, Teres, and Adiantum are all members of the class 'Pteropsida'.
- Cella genela, however, is classified under a different class, Isopterosida.

5. **Identify the Odd One Out**:
- Since Cella genela does not belong to the class Pteropsida, it is the odd one out.

### Conclusion:
- The odd one out with respect to members of class 'Pteropsida' is **Cella genela**.