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Consider the following schedule:
S:R2(A), W1(B), W1(C), R3(B), R2(B), R1 (A), commit_1, R2(C), commit_2, W3(A), commit_3

How many given statements true about schedule(S)____.

(i) Schedule(S) is conflict serializable schedule.
(ii) Schedule(S) is allowed by 2PL.
(iii) Schedule(S) is strict recoverable schedule.
(iv) Schedule(S) is allowed by strict 2PL.

only 1 is correct as per my answer but in answer they have given 3
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