Which one of the following group of terms are interrelated.

Options

A. Standard, keel wings and vexillary
B. Staminode, epipetalous, epiphyllous and syncarpous
C. Marginal, Parietal, free central and apical
D. Hilum, micropyle, tegment and mesocarp

Answer

To determine which group of terms is interrelated, we will analyze the terms provided in option 1: standard, keel, wings, and vaxillary.

### Step 1: Define the Terms
- **Standard**: In the context of flowers, particularly in legumes, the standard petal is the largest petal that is often broad and serves as a landing platform for pollinators.
- **Keel**: This refers to the two fused petals that form a boat-like structure in some flowers, particularly in the Fabaceae family.
- **Wings**: These are the lateral petals that are typically smaller and located on either side of the keel in a flower.
- **Vaxillary**: This term refers to a specific type of floral arrangement known as vaxillary estivation, which is characteristic of the Fabaceae family. In this arrangement, the petals are arranged in a specific way: the standard petal is at the top, the wings are on the sides, and the keel is at the bottom.

### Step 2: Analyze the Relationships
- The terms "standard," "keel," and "wings" all refer to specific parts of a flower, particularly in the context of the vaxillary estivation found in legumes.
- Vaxillary estivation describes how these petals are arranged in relation to one another.

### Step 3: Conclusion
Since all four terms (standard, keel, wings, and vaxillary) are related to the structure and arrangement of petals in certain flowers, particularly in the Fabaceae family, we can conclude that they are interrelated.

### Final Answer
The group of terms that are interrelated is: **Standard, Keel, Wings, and Vaxillary**.

---