In steady flow, the properties of a fluid such as velocity, pressure, temperature etc. remain constant with time. However, if the velocity exceeds its limit, the flow can become turbulent. Therefore, flow can be steady if the velocity is well within limits, making option (A) acceptable. However, if the velocity increases beyond its limit, or the properties of fluid changes with time, the Flow can be turbulent. Hence, option (B) is also possible.

Now, if the velocity in A is well within limits while in B it exceeds the limit, option (C) can be true.

But if the flow is steady in B it will be steady in A as the velocity in A is half of that in B. So option (D) is untrue.