Which is the first acceptor of `CO_(2)` in `C _(4)` pathway?

Explanation

### Step-by-Step Solution:

1. **Understanding the C4 Pathway**: The C4 pathway is a photosynthetic process that occurs in certain plants, allowing them to efficiently fix carbon dioxide (CO2) in conditions where it might be limiting.

2. **Identifying the First Acceptor of CO2**: In the C4 pathway, the first molecule that captures CO2 is crucial for the process. This molecule is known as phosphoenolpyruvate (PEP).

3. **Role of PEP Carboxylase**: The enzyme responsible for catalyzing the reaction where CO2 is fixed to PEP is called phosphoenolpyruvate carboxylase (PEPC). This enzyme facilitates the conversion of PEP and CO2 into a four-carbon compound.

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