Read the given statements and select the correct option.
Statement 1 : Carboxylation is the most crucial step of Calvin cycle where `CO_(2)` is utilised for the carboxylation of RuBP.
Statement 2: Carboxylation is catalysed by the enzyme RuBis CO which results in the formation of two molecules of 3PGA.

Options

A. Both statement 1 and 2 are correct.
B. Statement 1 is correct but statement 2 is incorrect.
C. Statement 1 is incorrect but statement 2 is correct
D. Both statements 1 and 2 are incorrect.

Explanation

To determine the correctness of the given statements regarding the Calvin cycle, we can analyze each statement step-by-step.

### Step-by-Step Solution:

1. **Understanding Statement 1**:
- Statement 1 claims that carboxylation is the most crucial step of the Calvin cycle where CO₂ is utilized for the carboxylation of RuBP (ribulose bisphosphate).
- In the Calvin cycle, the carboxylation of RuBP by CO₂ is indeed a critical step. This reaction leads to the formation of a 6-carbon intermediate that quickly splits into two molecules of 3-phosphoglycerate (3-PGA). Therefore, Statement 1 is correct.

2. **Understanding Statement 2**:
- Statement 2 states that carboxylation is catalyzed by the enzyme RuBisCO, resulting in the formation of two molecules of 3-PGA.
- RuBisCO (Ribulose bisphosphate carboxylase/oxygenase) is the enzyme responsible for catalyzing the carboxylation of RuBP. When RuBP reacts with CO₂, it forms a 6-carbon compound that immediately splits into two molecules of 3-PGA. Thus, Statement 2 is also correct.

3. **Conclusion**:
- Both statements are accurate regarding their descriptions of the carboxylation step in the Calvin cycle and the role of RuBisCO. Therefore, the correct option is that both statements are true.

### Final Answer:
Both Statement 1 and Statement 2 are correct.

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