You plan to deploy a service named Service1. When you deploy Service1, you plan to deploy several
SQL scripts to a virtual machine named VM1 by using an Application Profile. You need that ensure
that a user named User1 is prompted for the name of the SQL instance during the deployment of
Service1. Which value should you add to the Application Profile?

A.
@SQLServerInstanceName@

B.
%SQLServerInstanceName%

C.
#SQLServerInstanceName#

D.
$SQLServer1nstanceName$

Explanation:
https://blogs.technet.com/b/scvmm/archive/2011/09/27/vmm-2012-sql-serverprofile.aspx?Redirected=true