Which of the following has Meta Prefix :

Options

A. `H_(3)BO_(3)`
B. `H_(3)PO_(4)`
C. `H_(2)CO_(3)`
D. `HPO_(3)`

Explanation

To determine which of the given compounds has the "meta" prefix, we need to analyze each compound and identify their names. Here’s a step-by-step solution:

### Step 1: Identify the Compounds
We have the following compounds:
1. H3PO3
2. H3PO4
3. H2CO3
4. HPO3

### Step 2: Name Each Compound
Now, let's name each of these compounds:
1. **H3PO3** - This compound is known as **phosphorous acid** (not boric acid).
2. **H3PO4** - This compound is known as **phosphoric acid**.
3. **H2CO3** - This compound is known as **carbonic acid**.
4. **HPO3** - This compound is known as **metaphosphoric acid**.

### Step 3: Identify the Meta Prefix
The term "meta" is used as a prefix in the naming of certain acids, particularly in the case of phosphoric acids.

From our naming:
- **HPO3** is called **metaphosphoric acid**, which includes the "meta" prefix.

### Conclusion
Therefore, the compound that has the "meta" prefix is **HPO3**, which is **metaphosphoric acid**.

### Final Answer
The correct option is **HPO3**.

---