A dicot exalbuminous seed is

Options

A. Pea
B. Castor
C. Rice
D. Wheat

Answer

To determine which dicot seed is exalbuminous, we need to understand the definitions and characteristics of albuminous and exalbuminous seeds.

### Step-by-Step Solution:

1. **Understand Seed Types**:
- Seeds can be classified into two main types: albuminous (or endospermic) seeds and exalbuminous (or non-endospermic) seeds.
- Albuminous seeds contain endosperm at maturity, while exalbuminous seeds do not have endosperm because it is consumed during the development of the embryo.

2. **Identify Dicot Seeds**:
- Dicot seeds can be either albuminous or exalbuminous.
- Examples of exalbuminous dicot seeds include pea (Pisum sativum) and groundnut (Arachis hypogaea).

3. **Analyze the Options**:
- **Option 1: Pea** - Pea is a dicot and is an exalbuminous seed. This option is correct.
- **Option 2: Castor** - Castor is a dicot but is an albuminous seed (contains endosperm). This option is incorrect.
- **Option 3: Rice** - Rice is a monocot and is an albuminous seed. This option is incorrect.
- **Option 4: Wheat** - Wheat is also a monocot and is an albuminous seed. This option is incorrect.

4. **Conclusion**:
- The only dicot exalbuminous seed from the options provided is the pea (Pisum sativum).
- Therefore, the answer to the question is **Pea**.

### Final Answer:
**A dicot exalbuminous seed is Pea (Pisum sativum).**