Q63

Consider the following three schedules of transactions T1, T2 and T3. [Notation: In the following NYO represents the action Y (R for read, W for write) performed by transaction N on object O.]

$$\begin{array}{llll}\hline (S1) & 2RA & 2WA & 3RC & 2WB & 3WA & 3WC & 1RA & 1RB & 1WA & 1WB \\\hline (S2) & 3RC & 2RA & 2WA & 2WB & 3WA & 1RA & 1RB & 1WA & 1WB & 3WC \\\hline (S3) & 2RA & 3RC & 3WA & 2WA & 2WB & 3WC & 1RA & 1RB & 1WA & 1WB \\\hline \end{array}$$

Which of the following statements is TRUE?