Comparing the time T1 taken for a single instruction on a pipelined CPU with time T2 taken on a non-pipelined but identical CPU, we can say that:

A) T1 < />
B) T1 > T2
C) T1 = T2
D) T1 and T2 plus the time taken for one instruction fetch cycle

The correct answer is option B, which means that the time taken for a single instruction on a pipelined CPU is greater than the time taken on a non-pipelined but identical CPU.

Explanation:

1. What is a pipelined CPU?
- A pipelined CPU is a processor that can execute multiple instructions simultaneously by dividing the instruction execution process into multiple stages.

2. What is a non-pipelined CPU?
- A non-pipelined CPU is a processor that executes instructions one at a time, without dividing the instruction execution process into multiple stages.

3. Why does a pipelined CPU take more time for a single instruction than a non-pipelined CPU?
- While a pipelined CPU can execute multiple instructions simultaneously, the pipeline itself introduces overhead and latency that can slow down the execution of a single instruction.
- In a pipelined CPU, each instruction is divided into multiple stages, and each stage has its own latency and overhead.
- As a result, the time taken for a single instruction on a pipelined CPU is the sum of the time taken for each stage, plus the overhead and latency introduced by the pipeline itself.
- In contrast, a non-pipelined CPU executes instructions one at a time, without the overhead and latency introduced by the pipeline.

4. Why is option B the correct answer?
- Option A (T1 < t2)="" is="" incorrect="" because="" a="" pipelined="" cpu="" is="" designed="" to="" execute="" instructions="" faster="" than="" a="" non-pipelined="" cpu,="" so="" the="" time="" taken="" for="" a="" single="" instruction="" on="" a="" pipelined="" cpu="" should="" be="" less="" than="" the="" time="" taken="" on="" a="" non-pipelined="" />
- Option C (T1 = T2) is incorrect because a pipelined CPU introduces additional overhead and latency that can slow down the execution of a single instruction.
- Option D (T1 and T2 plus the time taken for one instruction fetch cycle) is incorrect because it assumes that the time taken for a single instruction on a pipelined CPU is the same as on a non-pipelined CPU, which is not true.
- Therefore, option B (T1 > T2) is the correct answer because the time taken for a single instruction on a pipelined CPU is greater than the time taken on a non-pipelined CPU.