The true embryo develops as a result of fusion of

Options

A. two polar nuclei of embryo sac
B. egg cell and male gamete
C. synergid and male gamete
D. male gamete and antipodals

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the development of the true embryo in flowering plants and what it results from.

2. **Identifying Key Terms**: The term "true embryo" refers to the structure that develops from the fertilization process in plants.

3. **Understanding Plant Fertilization**: In flowering plants, fertilization involves a process known as double fertilization. This means that two fertilization events occur.

4. **Identifying the Components Involved**: In the ovule, there are several key components:
- **Egg Cell**: The female gamete.
- **Synergids**: Two cells that assist in the fertilization process.
- **Polar Nuclei**: Two nuclei located in the central cell of the ovule.
- **Antipodal Cells**: Three cells located at the opposite end of the ovule.

5. **Describing Double Fertilization**:
- One male gamete fuses with the egg cell to form the true embryo (this process is called syngamy).
- The second male gamete fuses with the polar nuclei to form the endosperm (this is known as triple fusion).

6. **Conclusion**: The true embryo develops as a result of the fusion of the egg cell and the male gamete.

7. **Final Answer**: Therefore, the correct option is **B: egg cell and male gamete**.