Fusion product of polar nuclei is

Options

A. synergids
B. antipodals
C. endosperm nucleus
D. secondary nucleus

Answer

To solve the question regarding the fusion product of polar nuclei, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Fusion**:
- Fusion refers to the process of combining two entities to form a single product. In biological terms, it often involves the merging of nuclei.

**Hint**: Remember that fusion in biology typically involves the merging of genetic material.

2. **Identify Polar Nuclei**:
- Polar nuclei are two haploid nuclei found in the embryo sac of flowering plants. They are located at the center of the embryo sac and play a crucial role in fertilization.

**Hint**: Think about where polar nuclei are located and their role in the reproductive process of plants.

3. **Determine the Product of Fusion**:
- When the two polar nuclei fuse, they form a new structure. This structure is known as the secondary nucleus or the diploid nucleus.

**Hint**: Recall that the fusion of two haploid nuclei typically results in a diploid nucleus.

4. **Identify the Correct Option**:
- The options provided are:
- A) Synergids
- B) Antipodals
- C) Endosperm nucleus
- D) Secondary nucleus
- Since we established that the fusion of polar nuclei results in the formation of the secondary nucleus, the correct answer is option D.

**Hint**: Eliminate the other options by recalling their functions and roles in the plant reproductive process.

### Final Answer:
The fusion product of polar nuclei is the **secondary nucleus**.