Select the correct match :

Options

A. Phloem - Hadrome
B. Sieve tube - Callose plugs
C. Sieve tube - Gymnosperms
D. Phloem parenchyma - Water conduction

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms:**
- Identify the components mentioned in the question: phloem, hadron, sieve tube, callose plugs, gymnosperms, and phloem parenchyma.

2. **Evaluating the First Match: Phloem and Hadron:**
- Hadron is a term associated with xylem, which is responsible for the conduction of water and nutrients.
- Since hadron is not part of phloem, this match is incorrect.

3. **Evaluating the Second Match: Sieve Tube and Callose Plugs:**
- Sieve tubes are part of the phloem and are involved in the transport of food.
- Callose is a polysaccharide that accumulates in the sieve plates during stress conditions, plugging the sieve pores.
- This match is correct as callose plugs are indeed associated with sieve tubes.

4. **Evaluating the Third Match: Sieve Tube and Gymnosperms:**
- Gymnosperms do not have sieve tubes; instead, they have different types of cells for food conduction.
- Therefore, this match is incorrect.

5. **Evaluating the Fourth Match: Phloem Parenchyma and Water Conduction:**
- Phloem parenchyma is involved in the storage and transport of nutrients, not water.
- Water conduction is primarily the role of xylem.
- Hence, this match is also incorrect.

6. **Conclusion:**
- The only correct match identified is the second option: Sieve Tube and Callose Plugs.

**Final Answer:**
The correct match is **Sieve Tube and Callose Plugs.**

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