In an embryo sac, the cells that degenerate after fertilisation are

Options

A. synergids and primary endosperm cell
B. synergids and antipodals
C. antipodals and primary endosperm cell
D. egg and antipodals

Explanation

**Step-by-Step Solution:**

1. **Identify the Components of the Embryo Sac**: The embryo sac consists of several types of cells, including synergids, antipodal cells, and the egg cell.

2. **Understand the Process of Fertilization**: During fertilization, the male gamete (from pollen) fuses with the egg cell within the embryo sac.

3. **Determine the Fate of the Cells After Fertilization**: After the fertilization process, the egg cell develops into an embryo. However, the other cells in the embryo sac, specifically the synergids and antipodal cells, do not contribute to the formation of the embryo.

4. **Conclude Which Cells Degenerate**: The synergids and antipodal cells undergo degeneration after fertilization, meaning they break down and are no longer functional.

5. **Final Answer**: The cells that degenerate after fertilization in an embryo sac are the synergids and antipodal cells.

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