Assertion :- In prokaryotes, there occurs coupled transcription & translation.
Reason : In prokaryotes, translation occurs in cytoplasm and transcription in nucleoplasm.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that in prokaryotes, transcription and translation occur together (coupled). This means that as soon as mRNA is synthesized from DNA (during transcription), ribosomes can begin translating that mRNA into protein without any delay.

2. **Understanding the Reason**:
- The reason provided claims that in prokaryotes, transcription occurs in the nucleoplasm and translation occurs in the cytoplasm. This statement is incorrect because prokaryotes do not have a defined nucleus or nucleoplasm.

3. **Analyzing Prokaryotic Processes**:
- In prokaryotic cells (like bacteria), both transcription (the synthesis of mRNA from DNA) and translation (the synthesis of proteins from mRNA) occur in the cytoplasm. There is no separation of these processes as seen in eukaryotic cells, where transcription occurs in the nucleus and translation occurs in the cytoplasm.

4. **Conclusion**:
- Since the assertion is true (coupled transcription and translation do occur in prokaryotes) and the reason is false (transcription does not occur in nucleoplasm in prokaryotes), we conclude that the assertion is correct, but the reason is incorrect.

### Final Answer:
- **Assertion**: True
- **Reason**: False