People suffering from albinism cannot synthesize.

Options

A. Suberin
B. Melanin
C. Keratin
D. Collagen

Answer

To solve the question "People suffering from albinism cannot synthesize," we need to understand the condition of albinism and what it affects.

### Step-by-Step Solution:

1. **Understanding Albinism**:
- Albinism is a genetic condition characterized by a deficiency or absence of melanin, the pigment responsible for the color of skin, hair, and eyes.

2. **Identifying the Key Substance**:
- Since albinism is specifically related to the lack of melanin production, we need to focus on the options provided in the question to see which one relates to melanin.

3. **Evaluating the Options**:
- **Option 1: Submarine** - This is not relevant to the question as it refers to a type of vessel and has no connection to biological synthesis.
- **Option 2: Melanin** - This is the correct answer since individuals with albinism cannot synthesize melanin due to the genetic mutation affecting melanin production.
- **Option 3: Carotene** - This is a pigment found in plants and is not related to melanin. Thus, it is not the correct answer.
- **Option 4: Collagen** - This is a structural protein found in connective tissues but is unrelated to melanin synthesis.

4. **Conclusion**:
- The correct answer is **Option 2: Melanin**, as people suffering from albinism cannot synthesize melanin.