Which of the following are correct statements?
(i) It is possible for different transactions to hold locks on the same data item in x and z node at
the same time.
(ii) It is possible for more than one transaction to hold lock on same database element in 3
mode, at the same time another transaction holds a lock on the same element in mode y.
(iii)It is possible for different transactions to hold locks on the same element in all 3 lock
modes at the same time.
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i), (ii) and (iii)
