Anemophilous pollination is mainly observed in

Options

A. Gramineae
B. Annonaceae
C. Papilionaceae
D. Euphorbiaceae

Explanation

### Step-by-Step Solution:

1. **Understanding Anemophilous Pollination**:
- Anemophilous pollination refers to the transfer of pollen grains through the wind. This type of pollination is characterized by the lightweight and dry nature of pollen grains, which allows them to be easily carried by air currents.

2. **Identifying Characteristics of Pollen Grains**:
- For effective wind pollination, pollen grains must possess specific characteristics:
- They should be small in size.
- They should be light in weight.
- They should have a smooth and dry surface to facilitate easy movement through the air.
- They should not be sticky or heavy, as this would hinder their ability to be carried by the wind.

3. **Evaluating the Given Options**:
- The question provides four plant families:
- A) Gramini (Grasses)
- B) Anonasi
- C) Papillonasi
- D) Euphorbasi
- Among these, the Gramini family, which includes grasses, is known for anemophilous pollination.

4. **Conclusion**:
- Based on the characteristics of anemophilous pollination and the evaluation of the plant families, the correct answer is **A) Gramini**. This family is primarily associated with wind pollination.