Identify the correct pair combinations
(i) Chara - Monosporous - Chlorophyll a, b
(ii) Salvinia - Homosporous - Free floating hydrophytes
(iii) Ectocarpus- Filamentous form - Chlorophyll a, d
Laminaria - Biflagellate gametes - Haplodiplontic lifecycle

Options

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

Answer

To solve the question of identifying the correct pair combinations, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Analyze Chara:**
- Chara is a type of green algae.
- It is known to be **monosporous**, meaning it produces one type of spore.
- Chara contains **chlorophyll a and b**, which are characteristic of green algae.
- **Conclusion:** The statement about Chara is correct.

2. **Analyze Salvinia:**
- Salvinia is a type of aquatic fern.
- It is known to be **heterosporous**, meaning it produces two different types of spores (microspores and megaspores).
- Although Salvinia can be found floating on water, the key point here is that it is **not homosporous**.
- **Conclusion:** The statement about Salvinia is incorrect.

3. **Analyze Ectocarpus:**
- Ectocarpus is a type of brown algae.
- It is known to have **chlorophyll a and d**.
- However, Ectocarpus is not typically described as a filamentous form; it can be found in various forms including a thallus.
- **Conclusion:** The statement about Ectocarpus is incorrect.

4. **Analyze Laminaria:**
- Laminaria is also a type of brown algae.
- It is known to produce **biflagellate gametes**, which means the gametes have two flagella of equal size.
- Laminaria exhibits a **haplodiplontic life cycle**, which includes both haploid and diploid stages.
- **Conclusion:** The statement about Laminaria is correct.

### Final Conclusion:
Based on the analysis:
- The correct pairs are:
- (i) Chara - Monosporous - Chlorophyll a, b (Correct)
- (ii) Salvinia - Homosporous - Free floating hydrophytes (Incorrect)
- (iii) Ectocarpus - Filamentous form - Chlorophyll a, d (Incorrect)
- (iv) Laminaria - Biflagellate gametes - Haplodiplontic lifecycle (Correct)

Thus, the correct answer is **Option B: Chara and Laminaria**.