Cattle feed should contain

Options

A. roughage
B. concentrate
C. both (a) and (b)
D. none of these.

Explanation

### Step-by-Step Solution:

1. **Understanding Cattle Feed**: Cattle feed is essential for the health and productivity of cattle. It must provide the necessary nutrients for growth, reproduction, and milk production.

2. **Components of Cattle Feed**:
- **Roughage**: This is a key component of cattle feed. Roughage is high in fiber and primarily consists of cellulose. Cattle have specialized enzymes that allow them to digest cellulose, which humans cannot digest.
- **Concentrates**: These are feed components that are rich in nutrients, particularly proteins. Concentrates help to provide the necessary energy and protein that cattle need.

3. **Importance of Roughage**: Roughage, such as straws and stalks, is crucial for proper digestion in cattle. It helps maintain a healthy digestive system and ensures that cattle can effectively process their food.

4. **Importance of Concentrates**: Concentrates are important for providing high levels of protein and other nutrients that are essential for the growth and productivity of cattle.

5. **Balanced Nutrition**: A balanced diet for cattle includes both roughage and concentrates. This combination ensures that cattle receive all the necessary nutrients for optimal health.

6. **Conclusion**: Therefore, cattle feed should contain both roughage (like straws and stalks) and concentrates (high protein and nutrient-rich materials) to provide a balanced nutrition.

### Final Answer:
Cattle feed should contain both roughage and concentrates.

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