Modified assimilatory organs with nodes and internodes are found in
A) Taeniophyllum B) Opuntia
C) Lathyrus D) Ruscus

Options

A. A, B
B. B, C
C. C,D,E
D. B, D

Answer

To determine which of the given options has modified assimilatory organs with nodes and internodes, we can analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Modified Assimilatory Organs**:
- Modified assimilatory organs are parts of the plant that have adapted to perform photosynthesis. These modifications can occur in the stem or leaves, and they may take different forms.

2. **Identifying the Options**:
- The options provided are:
- A) Taeniophyllum
- B) Opuntia
- C) Lathyrus
- D) Ruscus

3. **Analyzing Taeniophyllum**:
- Taeniophyllum is an epiphytic plant that does not have a typical root system. Its roots are modified to absorb moisture from the air and do not have nodes and internodes. Therefore, it does not fit the criteria.

4. **Analyzing Opuntia**:
- Opuntia, commonly known as cactus, has modified stems called phylloclades. These structures are green and perform photosynthesis. Phylloclades have nodes and internodes, making Opuntia a suitable candidate.

5. **Analyzing Lathyrus**:
- Lathyrus, or sweet pea, does not have any significant modifications in its stem or leaves that would allow it to perform photosynthesis through modified structures. Thus, it does not meet the criteria.

6. **Analyzing Ruscus**:
- Ruscus has modified stems known as cladodes that perform photosynthesis. These structures also have nodes and internodes, making Ruscus another suitable candidate.

7. **Conclusion**:
- Based on the analysis, both Opuntia and Ruscus have modified assimilatory organs with nodes and internodes. However, since the question asks for a single answer, we can conclude that the best answer is **B) Opuntia**, as it is a well-known example of a plant with such modifications.

### Final Answer:
**B) Opuntia**