Which of the following is the correct combination of merits of an inflorescence?
(i)Flowers can be unisexual
(ii) Increased efficiency of pollination
(iii) Ensuring self pollination and fertility
(iv) Attract pollinators easily

Options

A. i, ii and iii
B. ii, iii and iv
C. Both a and b
D. All of above

Answer

To solve the question regarding the merits of an inflorescence, we need to analyze each of the given options (i, ii, iii, iv) and determine which ones are true regarding the advantages of inflorescence.

### Step-by-Step Solution:

1. **Understanding Inflorescence**:
- Inflorescence refers to the arrangement of flowers on a floral axis. It can be classified into two main types: racemose (indeterminate) and cymose (determinate).

2. **Evaluating Each Option**:
- **(i) Flowers can be unisexual**:
- This statement is not a merit of inflorescence itself. Inflorescence can have both unisexual and bisexual flowers, but the presence of unisexual flowers is not a direct advantage of having an inflorescence.
- **Conclusion**: Not a merit.

- **(ii) Increased efficiency of pollination**:
- Inflorescences can enhance the visibility of flowers, making them more attractive to pollinators. This clustering can lead to increased chances of pollination as multiple flowers are presented together.
- **Conclusion**: This is a merit.

- **(iii) Ensuring self-pollination and fertility**:
- While some inflorescences can facilitate self-pollination, this is not a universal merit of all inflorescences. Many inflorescences promote cross-pollination, which is beneficial for genetic diversity.
- **Conclusion**: This is not a definitive merit.

- **(iv) Attract pollinators easily**:
- Inflorescences, by virtue of their structure and arrangement, can attract pollinators more effectively. The clustering of flowers makes it easier for pollinators to locate and access them.
- **Conclusion**: This is a merit.

3. **Final Assessment**:
- Based on the analysis, the correct combination of merits of an inflorescence includes:
- (ii) Increased efficiency of pollination
- (iv) Attract pollinators easily

### Final Answer:
The correct combination of merits of an inflorescence is (ii) and (iv).