Plant group in which phloem is composed of sieve tube elements, companion cells, phloem parenchyma & Phloem fibres

Answer

### Step-by-Step Solution:

1. **Understanding Phloem Composition**:
- Phloem is a type of vascular tissue in plants responsible for the transport of nutrients, particularly sugars produced through photosynthesis. It is composed of several key components: sieve tube elements, companion cells, phloem parenchyma, and phloem fibers.

2. **Identifying Plant Groups**:
- Different plant groups exhibit variations in their phloem composition. For example:
- **Gymnosperms**: These plants lack companion cells in their phloem.
- **Monocots**: In these plants, phloem parenchyma is absent.

3. **Determining the Group with All Components**:
- The question specifies that we need to identify the plant group that contains all four components of phloem: sieve tube elements, companion cells, phloem parenchyma, and phloem fibers.
- Since gymnosperms and monocots do not have all these components, we can conclude that the group containing all four is **dicots**.

4. **Final Answer**:
- The plant group in which phloem is composed of sieve tube elements, companion cells, phloem parenchyma, and phloem fibers is **dicots** (a subgroup of angiosperms).