Heroku Industries has a SQL Server database that provides data to clients throughout its network. It has now asked George, a network engineer, to sort an issue within the administration branch where the Windows firewall does not allow access to the users to such databases. Analyze what port should George open up in the firewall so that the issue is resolved.

a$.$ Open up port $1433$

b$.$ Open up port $389$

c$.$ Open up port $5061$

d$.$ Open up port $1521$