Consider the statements given below and choose the correct option, with respect to IDFNTITY in SQL Server:

i$.$ An Identity column must not allow NULL values

ii$.$ IDENT$\_$CURRFNT returns the last inserted identlty value for a table in any session

iii. @@IDENTITY returns the first Inserted value among a group of INSERT statements

iv$.$ The identity columin value can be explicitly inserted using the statement SET IDENTITY$-$INSERT OFF

Statements iii and iv arecorrect and statements $/$and if are incorrect

Statements $1$ and ri are correct and statementsili and ware incorrect

Statements i$,$ ii and iii are correct and statement $N$ is incoirect.

Statements i$,$ ii and iv are correct and statement in is incorrect