Which is false about `C_(4)` pathway

Options

A. The primary acceptor is a four carbon`C_ compound
B. Bundle sheath cells contain PEP case
C. Enzyme for `CO_(2)` fixation is PEP case
D. Mesophyll cells lack RuBisCO

Answer

### Step-by-Step Solution:

1. **Understanding the C4 Pathway**: The C4 pathway, also known as the Hatch and Slack pathway, is a photosynthetic process that occurs in certain plants, referred to as C4 plants. This pathway is characterized by the initial fixation of carbon dioxide into a four-carbon compound.

2. **Identifying the Primary Acceptor**: In the C4 pathway, the primary acceptor of carbon dioxide is phosphoenolpyruvate (PEP), which is a three-carbon compound. When carbon dioxide is fixed, it combines with PEP to form a four-carbon compound, oxaloacetate.

3. **Evaluating the Statements**: The question asks which statement about the C4 pathway is false. The first statement claims that the primary acceptor is a four-carbon compound, which is incorrect because it is actually a three-carbon compound (PEP).

4. **Examining Other Statements**: The second statement mentions that the bundle sheath contains PEP carboxylase (PEP case). This is also false because PEP case is present in the mesophyll cells, while the bundle sheath cells contain the enzyme ribulose bisphosphate carboxylase/oxygenase (rubisco).

5. **Conclusion**: Based on the analysis, both the first and second statements are false regarding the C4 pathway.

### Final Answer:
The false statements about the C4 pathway are:
1. The primary acceptor is a four-carbon compound (false, it is a three-carbon compound - PEP).
2. The bundle sheath contains PEP case (false, PEP case is found in mesophyll cells).