# Longest Remaining Time first with Non-preemption

Below is a question from a quiz I attempted(for preparing for a competitive exam), I found the solution to be bit confusing and wanted to clear my concept.

Below was the solution given

I have a query, that whether the process $$P_0$$ should be preempted at t=1, because at t=1, the longest remaining burst will be that of $$P_3$$, but if we go by the description of the question, then $$P_0$$ should not be preempted.?

What should be correct?