In embryo sac, three cells are grouped together at the micropylar end and constitute.

Options

A. Antipodals
B. Central cell
C. Egg apparatus
D. Synergids

Answer

**Step-by-Step Solution:**

1. **Understanding the Embryo Sac Structure**: The embryo sac is a female gametophyte found within the ovule of flowering plants. It typically consists of seven cells arranged in a specific manner.

2. **Identifying the Micropylar End**: The micropylar end of the embryo sac is the end that is closest to the micropyle, which is the opening in the ovule through which the pollen tube enters.

3. **Recognizing the Group of Cells at the Micropylar End**: At the micropylar end of the embryo sac, there are three specific cells that are grouped together. These cells play a crucial role in fertilization.

4. **Naming the Cells**: The three cells located at the micropylar end are known as the **egg apparatus**. This apparatus consists of one egg cell and two synergids.

5. **Conclusion**: Therefore, the three cells grouped together at the micropylar end of the embryo sac are referred to as the **egg apparatus**.

---