Which of the following is not related with flowering plants ?

Options

A. Double fertilization during reproduction
B. Female gametophytic consists of seven cell & eight nuclei
C. Presence of megasporengium in ovary
D. Presence of haploid endosperm

Explanation

To solve the question "Which of the following is not related with flowering plants?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Context**:
- We are looking for something that is not associated with flowering plants, also known as angiosperms.

2. **Analyzing Option 1: Double Fertilization**:
- Double fertilization is a unique process in flowering plants where one sperm fertilizes the egg to form the zygote, and another sperm fuses with two polar nuclei to form the triploid endosperm.
- **Conclusion**: This process is indeed related to flowering plants.

3. **Analyzing Option 2: Female Gametophyte Consists of 7 Cells and 8 Nuclei**:
- The female gametophyte, or embryo sac, in flowering plants typically consists of 7 cells and 8 nuclei. This includes one egg cell, two synergids, three antipodal cells, and one central cell with two polar nuclei.
- **Conclusion**: This statement is also correct and related to flowering plants.

4. **Analyzing Option 3: Presence of Megasporangium in Ovary**:
- The megasporangium, which develops into the ovule, is indeed present in the ovary of flowering plants.
- **Conclusion**: This statement is correct and related to flowering plants.

5. **Analyzing Option 4: Presence of Haploid Endosperm**:
- The endosperm in flowering plants is formed from the fusion of one sperm nucleus with two polar nuclei, resulting in a triploid (3N) endosperm. Therefore, the statement about haploid endosperm is incorrect.
- **Conclusion**: This is the statement that is not related to flowering plants.

### Final Answer:
The correct answer is **Option 4: Presence of haploid endosperm**.

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