Let us assume that transaction T1 has arrived before transaction T2. Consider schedule ?
S=r1(A); r2(B) ; w2(A) ; w1(B)
Which of the following is true?

A

Allowed under basic timestamp protocol.

B

Not allowed under basic timestamp protocols because T1 is rolled Back.

C

Not allowed under basic timestamp protocols because T2 is rolled back,

D

None of these