Maize grain is a fruit known as

Options

A. a) cypsela
B. b) caryopsis
C. c) legume
D. d) achene.

Explanation

To answer the question "Maize grain is a fruit known as," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Type of Fruit**:
- Maize grain is classified as a type of fruit. Specifically, it is a dry indehiscent fruit.

2. **Understand the Structure of the Fruit**:
- The maize grain develops from a monocarpillary ovary. This means that it originates from a single carpel (the female reproductive part of the flower).

3. **Examine the Pericarp**:
- In maize grain, the pericarp (the outer layer of the fruit) is fused with the seed coat. This fusion is a key characteristic of this type of fruit.

4. **Define the Specific Type of Fruit**:
- The specific term used to describe this type of fruit, where the pericarp is fused with the seed coat, is "caryopsis."

5. **Evaluate the Options**:
- Given the options:
- A) Sipsila - Incorrect
- B) Caryopsis - Correct
- C) Legume - Incorrect
- D) Echinate - Incorrect
- The correct answer is option B, which is "caryopsis."

### Final Answer:
Maize grain is a fruit known as **caryopsis**.

---