In context of database, let T1 and T2 are two concurrent transactions. Consider the following sequence of operations on data X :T1 : READ(X) T2 : READ(X)T1 : WRITE(X) T2 : WRITE(X)This is a __________ problem.

In context of database, let T1 and T2 are two concurrent transactions.

1.	In context of database, let T1 and T2 are two concurrent transactions. Consider the following sequence of operations on data X :T1 : READ(X) T2 : READ(X)T1 : WRITE(X) T2 : WRITE(X)This is a __________ problem.
A.	Dirty Read
B.	Lost Update
C.	Incorrect Summary
D.	Unrepeatable Read
Answer» B. Lost Update