all the formts are correct their is no error. firstly among the 4 we can not seclect any 2 bcoz of the all 4 are right. i was schoked when...

the max limit of nvarchar is given 30 but it is not complesory that every variable takes max length

the answer of this question is 4 not 60. i.e. the answer mentioned is wrong. when excutes this query it gives the result 4 in sqlserver 2005