Answer C is correct. SQL Server communicates on port 1433 by default. 433 is the TCP/IP NNSP port. 443 is the TCP/IP SSL port. 1443 is the IES (Integrated Engineering Software) port. Pharos uses 4443.
For more information, see the following sources:
Chapter 1, "Installing and Configuring SQL Server 2005"
SQL Server 2005 Books Online: "SQL Server Database Engine, Database Engine How-to Topics, Administration How-to Topics, Database Engine Connectivity How-to Topics, Server Connectivity How-to Topics, How to: Configure a Server to Listen on a Specific TCP Port (SQL Server Configuration Manager)"