Consider following statements with respect to the C4 pathway and select the correct ones.
(i) Mesophyll cells possess both RuBisCO and PEPcase enzymes.
(ii) Initial `CO_(2)` fixation occurs in mesophyll cells.
(iii) Final `CO_(2)` fixation occurs in bundle sheath cells.

Options

A. (a) i and iii
B. (b) ii and iii
C. (c) i and iii
D. (d) i, ii and iii

Explanation

To solve the question regarding the C4 pathway and the statements provided, we will evaluate each statement one by one to determine their correctness.

### Step-by-Step Solution:

1. **Evaluate Statement (i)**:
- **Statement**: Mesophyll cells possess both RuBisCO and PEPcase enzymes.
- **Analysis**: In the C4 pathway, mesophyll cells contain the enzyme PEPcase (phosphoenolpyruvate carboxylase), which is responsible for the initial fixation of CO2. However, RuBisCO (ribulose bisphosphate carboxylase/oxygenase) is found in the bundle sheath cells, not in the mesophyll cells. Therefore, this statement is **incorrect**.

2. **Evaluate Statement (ii)**:
- **Statement**: Initial CO2 fixation occurs in mesophyll cells.
- **Analysis**: In the C4 pathway, the initial fixation of CO2 indeed occurs in the mesophyll cells through the action of PEPcase, forming a four-carbon compound (oxaloacetic acid). Thus, this statement is **correct**.

3. **Evaluate Statement (iii)**:
- **Statement**: Final CO2 fixation occurs in bundle sheath cells.
- **Analysis**: After the initial fixation in mesophyll cells, the four-carbon compound (oxaloacetic acid) is transported to the bundle sheath cells, where it undergoes decarboxylation and is then converted into glucose by RuBisCO. Therefore, this statement is also **correct**.

### Conclusion:
- The correct statements are:
- Statement (ii): Initial CO2 fixation occurs in mesophyll cells. (Correct)
- Statement (iii): Final CO2 fixation occurs in bundle sheath cells. (Correct)
- Statement (i) is incorrect.

### Final Answer:
The correct options are **(ii) and (iii)**. Therefore, the answer is **Option B**.

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