Identify the correct statement from the following.

Options

A. Gonorrhoea, AIDS and syphilis are curable STDs.
B. Asexual reproduction in yeast takes place by fragmentation.
C. Layering and grafting are common methods of reproduction in potato and ginger.
D. Rhizopus and mucor reproduce commonly by spore formation

Answer

To solve the question "Identify the correct statement from the following," we will analyze each option provided and determine which one is accurate.

### Step-by-Step Solution:

1. **Evaluate Option 1: Gonorrhea, AIDS, and syphilis are curable STDs.**
- Gonorrhea and syphilis are bacterial infections and can be treated with antibiotics, making them curable.
- AIDS, caused by the HIV virus, is not curable; it can be managed but not completely cured.
- **Conclusion:** This statement is incorrect.

2. **Evaluate Option 2: Asexual reproduction in yeast takes place by fragmentation.**
- Yeast is a unicellular fungus that primarily reproduces asexually through budding, not fragmentation.
- Fragmentation is not a method of asexual reproduction in yeast.
- **Conclusion:** This statement is incorrect.

3. **Evaluate Option 3: Layering and grafting are common methods of reproduction. Potato and ginger are examples.**
- Layering and grafting are methods of vegetative propagation, but they are not the methods used for potatoes and ginger.
- Potatoes reproduce through tubers (specifically, the eyes of the potato), and ginger reproduces through rhizomes.
- **Conclusion:** This statement is incorrect.

4. **Evaluate Option 4: Rhizopus and Mucor reproduce commonly by spore formation.**
- Rhizopus and Mucor are both fungi, and they primarily reproduce through spore formation, which is a common method of reproduction in fungi.
- **Conclusion:** This statement is correct.

### Final Answer:
The correct statement is **Option 4: Rhizopus and Mucor reproduce commonly by spore formation.**