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T1 : r1(x) ,r1(z) , r1(y) , w1(z)

T2: r1(z) , r1(x) , r1(y) ,w1(x)

Which is true?

S1 :Every non serial schedule between T1 and T2 are conflict serializable schedule

S2:some non serial schedule between T1 and T2 is conflict serializable schedule

S3 :some non serial schedule between T1 and T2 forms deadlock using 2PL

S4: some non serial schedule between T1 and T2 is allowed using 2PL

( can be more than one)

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