Underground stem of onion modified for storing food is

Options

A. Tuber
B. Rhizome
C. Bulb
D. Corm

Answer

To solve the question "Underground stem of onion modified for storing food is," we can follow these steps:

### Step 1: Understand the Question
The question asks for the type of underground stem that is modified in onions for the purpose of food storage.

### Step 2: Identify the Options
We need to consider the options provided (though they are not explicitly listed in the question, we can infer common terms related to underground stems):
1. Tuber
2. Rhizome
3. Bulb
4. Corm

### Step 3: Analyze Each Option
- **Tuber**: This is an underground stem modification found in plants like potatoes. It stores starch but is not the correct answer for onions.

- **Rhizome**: This is a horizontal underground stem seen in plants like ginger. While it is a type of underground stem, it does not apply to onions.

- **Bulb**: This is the correct answer. A bulb is a modified stem that stores food and is characteristic of onions. It consists of fleshy leaves that store nutrients.

- **Corm**: This is another type of underground storage organ, but it is not the correct term for onions.

### Step 4: Conclusion
After analyzing all the options, we conclude that the underground stem of onion modified for storing food is a **Bulb**.

### Final Answer
The underground stem of onion modified for storing food is **Bulb**.

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