Conducting part of phloem according to Haberlandt (1914) is

Options

A. Hadrom
B. Laptom
C. Sterom
D. Bark

Answer

### Step-by-Step Solution

1. **Understanding Phloem**: Phloem is a type of vascular tissue in plants responsible for the transport of nutrients, particularly sugars produced through photosynthesis.

2. **Identifying the Conducting Parts**: According to the scientist Haberlandt (1914), the conducting parts of phloem include:
- **Sieve Elements**: These are elongated tube-like structures that play a crucial role in the translocation of food.
- **Companion Cells**: These cells are associated with sieve elements and are vital for their function. They are living cells and are not found in pteridophytes and gymnosperms.
- **Phloem Parenchyma**: This type of cell primarily stores food.
- **Phloem Fibers**: These provide structural support to the phloem.

3. **Determining the Most Important Conducting Part**: Among these components, the sieve elements are the most critical for the conduction of food, as they directly facilitate the transport of sugars.

4. **Conclusion**: Based on Haberlandt's classification, the conducting part of phloem is primarily the **sieve element**.

### Final Answer
The conducting part of phloem according to Haberlandt (1914) is the **sieve element**.