Consider the following schedule for transactions T1, T2 and T3:
| T1 | T2 | T3 |
| Read(X) | ||
| Read(Y) | ||
| Read(Y) | ||
| Write(Y) | ||
| Write(X) | ||
| Write(X) | ||
| Read(X) | ||
| Write(X) |
Which one of the schedules below is the correct serialization of the above transactions?
1
T1 → T3 → T2
2
T3 → T1 → T2
3
T2 → T1 → T3
4
T3 → T2 → T1