A medicinal plant of Brassicaceae is

Options

A. Sisymbrium irio
B. Lepidium sativum
C. Cheiranthus cheiri
D. All the above.

Answer

To answer the question "A medicinal plant of Brassicaceae is," we will analyze the options provided and identify which of them belong to the Brassicaceae family and have medicinal properties.

### Step-by-Step Solution:

1. **Identify the Family**: The Brassicaceae family, also known as the mustard family, includes a variety of plants that are known for their edible and medicinal properties. Common members include mustards, cabbages, and other cruciferous vegetables.

2. **Evaluate Each Option**:
- **Sisymbrium aereo**: Commonly known as London rocket, this plant is recognized for its medicinal properties, including treatment for cough congestion, rheumatoid arthritis, and detoxification of the liver and spleen.
- **Lepidium sativum**: Known as pepper grass, this plant has anti-inflammatory and anti-analgesic properties. It is also used in the treatment of asthma.
- **Chorispora tenella**: Commonly referred to as wallflower, this plant is used to treat deafness and wisdom teeth pain, and it acts as a relaxant.

3. **Conclusion**: All three plants mentioned (Sisymbrium aereo, Lepidium sativum, and Chorispora tenella) belong to the Brassicaceae family and possess medicinal properties. Therefore, the correct answer is that all of the above options are medicinal plants of the Brassicaceae family.

### Final Answer:
The correct answer is **All of the above**.

---