Read the following statements
(i) Collenchyma contains lignin in its wall thickenings.
(ii) Collenchyma occurs in only aerial primary parts and is absent from the roots.
(iii) Trichomes are multicellular epidermal outgrowths, which also contain some inner tissues.
(iv) Xylem fibres often occur in metaxylem while they are absent or rare in protoxylem.
which of these are correct?

Options

A. (i), (ii) and (iii)
B. (i), (ii) and (iv)
C. (i) and (iii)
D. (ii) and (iv)

Answer

To determine which of the given statements about plant anatomy are correct, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Evaluate Statement (i)**:
- **Statement**: "Collenchyma contains lignin in its wall thickenings."
- **Analysis**: This statement is incorrect. Collenchyma is characterized by its cell wall thickenings that primarily consist of cellulose and hemicellulose, not lignin.
- **Conclusion**: This statement is **false**.

2. **Evaluate Statement (ii)**:
- **Statement**: "Collenchyma occurs in only aerial primary parts and is absent from the roots."
- **Analysis**: This statement is correct. Collenchyma is typically found in the aerial parts of plants, such as young stems and leaf margins, and is not present in roots.
- **Conclusion**: This statement is **true**.

3. **Evaluate Statement (iii)**:
- **Statement**: "Trichomes are multicellular epidermal outgrowths, which also contain some inner tissues."
- **Analysis**: This statement is incorrect. While trichomes are indeed multicellular epidermal outgrowths, they do not contain inner tissues; they are extensions of the epidermis.
- **Conclusion**: This statement is **false**.

4. **Evaluate Statement (iv)**:
- **Statement**: "Xylem fibres often occur in metaxylem while they are absent or rare in protoxylem."
- **Analysis**: This statement is correct. Xylem fibers are commonly found in metaxylem, which is the later-formed xylem, while they are either absent or found in very low numbers in protoxylem, the early-formed xylem.
- **Conclusion**: This statement is **true**.

### Summary of Findings:
- Statement (i): False
- Statement (ii): True
- Statement (iii): False
- Statement (iv): True

### Correct Statements:
The correct statements are (ii) and (iv).

### Final Answer:
The correct statements are (ii) and (iv).

---