Hi Ghulam Yaseen,
Replying to this thread lately. I doubt if I am able to follow the thread to its entirely. If you are looking for an option of doing release management via CA RA, I think you can do it.
Again I am not sure as to what is the scope of release management you are considering but with help of continuous delivery edition along with CA RA, I think you would be able to get it cover.
Let know if it answer your question.
#openquestions