Which Transact-SQL statement should you use?

You use Microsoft SQL Server 2012 to develop a database application. You create a stored procedure named
DeleteJobCandidate. You need to ensure that if DeleteJobCandidate encounters an error, the execution of the
stored procedure reports the error number. Which Transact-SQL statement should you use?

A.
DECLARE @ErrorVar INT;
DECLARE @RowCountVar INT;
EXEC DeleteJobCandidate
SELECT @ErrorVar = @@ERROR, @RowCountVar = @@ROWCOUNT;
IF (@ErrorVar <> 0)
PRINT N’Error = ‘ + CAST(@@ErrorVar AS NVARCHAR(8)) +
N’, Rows Deleted = ‘ + CAST(@@RowCountVar AS NVARCHAR(8));
GO

B.
DECLARE @ErrorVar INT;
DECLARE @RowCountVar INT;
EXEC DeleteJobCandidate
SELECT @ErrorVar = ERROR_STATE(), @RowCountVar = @@ROWCOUNT;
IF (@ErrorVar <> 0)
PRINT N’Error = ‘ + CAST(ERRORSTATE() AS NVARCHAR(8)) +
N’, Rows Deleted = ‘ + CAST(@@RowCountVar AS NVARCHAR(8));
GO

C.
EXEC DeleteJobCandidate
IF (ERROR_STATE() != 0)
PRINT N’Error = ‘ + CAST(@@ERROR AS NVARCHAR(8)) +
N’, Rows Deleted = ‘ + CAST(@@ROWCOUNT AS NVARCHAR(8));
GO

D.
EXEC DeleteJobCandidate
PRINT N’Error = ‘ + CAST(@@ERROR AS NVARCHAR(8)) +
N’, Rows Deleted = ‘ + CAST(@@ROWCOUNT AS NVARCHAR(8));
GO

Explanation:
Verified answer as correct.
Reference: http://msdn.microsoft.com/en-us/library/ms190193.aspx
Reference: http://msdn.microsoft.com/en-us/library/ms188790.aspx