From among the sets of terms given below, identify those that are associated with the gynoecium.

Options

A. Stigma, ovule, embryo sac, placenta
B. Thalamus, pistil, style, ovule
C. Ovule, ovary, embryo sac, tapetum
D. ovule, stamen, ovary, embryo sac

Explanation

To identify the terms associated with the gynoecium, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Gynoecium**:
- The gynoecium is the female reproductive part of a flower. It consists of structures that are involved in reproduction.

2. **Identify Key Structures of the Gynoecium**:
- The primary structures associated with the gynoecium include:
- **Stigma**: The part that receives pollen grains.
- **Style**: The tube that connects the stigma to the ovary.
- **Ovary**: The part that contains ovules and is where fertilization occurs.
- **Ovules**: The structures within the ovary that develop into seeds upon fertilization.
- **Embryo Sac**: The female gametophyte found within the ovule.
- **Placenta**: The tissue within the ovary to which ovules are attached.

3. **Review the Options**:
- Examine the provided options to see which terms are associated with the gynoecium.

4. **Evaluate Each Option**:
- **Option 1**: Stigma, Ovule, Embryo Sac, Placenta - All these terms are associated with the gynoecium.
- **Option 2**: Pistil, Style, Ovule - All these terms are also associated with the gynoecium, but "thalamus" is not.
- **Option 3**: Ovule, Ovary, Embryo Sac - These are associated with the gynoecium, but "tapetum" is not.
- **Option 4**: Ovule, Ovary, Embryo Sac - These are associated with the gynoecium, but "stamen" is not.

5. **Determine the Correct Answer**:
- The first option is the most comprehensive as it includes all parts associated with the gynoecium: stigma, ovule, embryo sac, and placenta.

### Conclusion:
- The correct answer is **Option 1**: Stigma, Ovule, Embryo Sac, and Placenta.