Could not find a valid parent module to add to the server when try to run a web application in webshpere RSA

Problem: When try to run a webapplication using RSA, right click project -> Run as -> Server, then it shows an error message that Could not find a valid parent module to add to the server

Solutions: There are two possible solutions
Option - 1:
                 Create the project project from the scratch and make sure to select the option "Add project to an                  EAR" in create dynamic webproject window

Option - 2:
                Create an EAR project and then add the web application project as a web module in EAR                     project