Which of the following types of embryo sac is mostly found in Angiosperm

Options

A. Bisporic polygonum type
B. Tetrasporic type
C. Monosporic onagrad type
D. Monosporic-polygonum type

Answer

### Step-by-Step Solution:

1. **Understanding Angiosperms**: Angiosperms are flowering plants that reproduce through seeds enclosed in fruits. They have a unique structure called the embryo sac, which is crucial for reproduction.

2. **Types of Embryo Sac**: There are several types of embryo sacs based on the number of megaspores involved in their formation. The main types are:
- **Biosporic Type**: Formed from two megaspores.
- **Tetrasporic Type**: Formed from four megaspores.
- **Monosporic Type**: Formed from one megaspore.

3. **Analyzing the Options**:
- **Biosporic Polygonum Type**: This type is formed from two megaspores, which is not the most common type found in angiosperms.
- **Tetrasporic Type**: This type is formed from four megaspores, but it is also not commonly found in angiosperms.
- **Monosporic Type**: This type is formed from one megaspore and can be further divided into two subtypes:
- **Polygonum Type**: This is the most common type of embryo sac found in angiosperms.
- **Inofera Type**: Less common compared to the Polygonum type.

4. **Identifying the Correct Answer**: Among the options provided, the **Monosporic Polygonum Type** is the most prevalent type of embryo sac found in angiosperms.

5. **Conclusion**: Therefore, the correct answer to the question is the **Monosporic Polygonum Type**.