The correct answer should be D-"The function does not exist". As per the examples in BOL:

USE AdventureWorks;

GO

BEGIN TRAN;

DECLARE @result int;

EXEC @result=sp_getapplock

@DbPrincipal='public',

@Resource='Form1',

...

Brian,

Thanks for taking the time to give us a great review of this product. Idownloaded the product as soon as I saw it on the SqlServerCentral ads and have been...