Answer is (A).
Here, in option B and C they have given CPU idle time is $0$ which is not possible as per schedule (B) and (C).
So, (B) and (C) are eliminated.
Now, lets see (A) and (D):
So, idle time is between $0$ and $1$ which is $1$ in case of option (A).
For option (D),
We can see that there is no idle time at all, but in option given idle time is $5$, which is not matching with our chart so option (D) is eliminated.
Therefore, the correct sequence is option (A).