The compounds having a highly specific hydro-philic group are named as

Options

A. Auxins
B. Cytokinins
C. Gibberellins
D. Ethylene

Answer

**Step-by-Step Solution:**

1. **Understanding Hydrophilic Groups:**
- Hydrophilic groups are parts of molecules that are attracted to water and can dissolve in it. These groups typically contain polar bonds and can form hydrogen bonds with water.

2. **Identifying the Options:**
- The options provided are:
- A) Oxins
- B) Cytokinins
- C) Gibberellins
- D) Ethylene

3. **Analyzing Each Option:**
- **Oxins:**
- Oxins are plant hormones that promote apical dominance but do not have a highly specific hydrophilic group. Thus, they are not the correct answer.
- **Cytokinins:**
- Cytokinins are known for promoting cell division and are present in roots and shoots. Their structure includes hydroxyl (OH) groups, indicating they have a high hydrophilic nature, which allows them to readily absorb and transport water. This makes them a strong candidate for having a highly specific hydrophilic group.
- **Gibberellins:**
- Gibberellins are involved in fruit shape, ripening, and elongation but do not have a highly specific hydrophilic group.
- **Ethylene:**
- Ethylene is a gaseous plant hormone and does not possess a hydrophilic group.

4. **Conclusion:**
- Based on the analysis, **Cytokinins** are the compounds that have a highly specific hydrophilic group due to their structure that includes hydroxyl groups.

**Final Answer: Cytokinins**

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