Which of the following can be used for cultivation of SCP ?

Options

A. Animal manure
B. Straw
C. Molasses
D. All of these

Explanation

### Step-by-Step Solution:

1. **Understanding SCP**:
- SCP stands for Single Cell Protein, which refers to the biomass derived from microorganisms such as yeast, algae, and fungi. These microorganisms are cultivated for their protein-rich content.

2. **Identifying the Microorganisms**:
- The main types of microorganisms used for SCP production include yeast, algae, and fungi. These organisms can be cultivated to produce a rich source of protein.

3. **Recognizing the Process**:
- The cultivation of SCP is primarily done through a process called fermentation. This process allows the microorganisms to grow and multiply, producing biomass that is high in protein.

4. **Determining the Substrates**:
- Various waste materials can serve as substrates for the cultivation of SCP. Common substrates include:
- Animal manure
- Straw
- Molasses
- Citrus waste
- Sulfide waste liquor
- Sewage waste

5. **Evaluating the Options**:
- The question provides several options: animal manure, straw, molasses, and all of these.
- Since all the listed options can be used as substrates for SCP cultivation, we can conclude that:
- Animal manure can be used.
- Straw can be used.
- Molasses can be used.

6. **Final Answer**:
- Therefore, the correct answer to the question "Which of the following can be used for cultivation of SCP?" is **D) all of these**.