3)1.
there is a single female flower at centre surrounded by many male flowers.....

Number of female flowers in a cyathium

There are several female flowers in a cyathium.

Explanation:
A cyathium is a specialized type of inflorescence found in plants of the spurge family (Euphorbiaceae). It consists of a cup-shaped involucre that encloses several individual flowers. Each cyathium contains both male and female flowers, along with other accessory structures.

Structure of a Cyathium:
- Involucre: The cyathium is surrounded by a cup-shaped structure called the involucre. It is composed of bracts (modified leaves) that protect the flowers within.
- Male Flowers: Inside the involucre, there are several male flowers called staminate flowers. Each staminate flower consists of a single stamen that produces pollen.
- Female Flowers: Among the male flowers, there are several female flowers called pistillate flowers. Each pistillate flower consists of a single pistil, which includes the stigma, style, and ovary.

Number of Female Flowers:
The number of female flowers in a cyathium can vary, but there are generally several of them. This means that a cyathium can have more than one female flower. The specific number of female flowers can differ between species and even within individuals of the same species.

Reproductive Function:
The female flowers in a cyathium play a crucial role in reproduction. They receive pollen from the male flowers, and if fertilization occurs, they develop into fruits containing seeds. The fruits of euphorbias are typically three-lobed capsules that split open to release the seeds.

Conclusion:
In summary, a cyathium contains several female flowers, along with male flowers and other accessory structures. The exact number of female flowers can vary, but they are essential for the reproductive process of euphorbias.