Edible tubers occur in

Options

A. Root tubers of Helianthus tuberosus
B. Stem tubers of Tragopogon porrifolius
C. Stem tubers of Helianthus tuberosus and root tubers of Tragopagon porrifolius
D. Both stem and root tubers in Safflower.

Answer

To solve the question "Edible tubers occur in," we need to analyze the provided options and determine which ones contain edible tubers.

### Step-by-Step Solution:

1. **Understand the Types of Tubers**:
- Tubers can be classified into two main types: root tubers and stem tubers.
- Root tubers are usually storage organs for nutrients, while stem tubers can also serve as storage but may be edible.

2. **Evaluate the First Option**:
- The first option mentions "root tubers of Helianthus tuberosus."
- Helianthus tuberosus, commonly known as Jerusalem artichoke, has edible tubers. However, the statement claims they are not for eating, which is incorrect. Thus, this option is **incorrect**.

3. **Evaluate the Second Option**:
- The second option mentions "stem tubers of Tragopogon polypolyus."
- Tragopogon polypolyus is known for its root tubers, which are not typically consumed. Therefore, this option is also **incorrect**.

4. **Evaluate the Third Option**:
- The third option states "stem tuber of Helianthus tuberosus and root tuber of Tragopogon polypolyus."
- The stem tuber of Helianthus tuberosus is indeed edible, and the root tuber of Tragopogon polypolyus is also edible. Hence, this option is **correct**.

5. **Evaluate the Fourth Option**:
- The last option mentions "both stem and root tubers of safflower."
- Safflower is primarily used for oil production and dye, and its tubers are not considered edible. Thus, this option is **incorrect**.

6. **Conclusion**:
- After evaluating all options, the correct answer is the third option, as it includes edible tubers.

### Final Answer:
The edible tubers occur in the stem tuber of Helianthus tuberosus and the root tuber of Tragopogon polypolyus.

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