Now, I can easily get the answers for my query with the help of this amazing plugin.
This Question & Answer plugin is a very powerful and robust plugin that enables us to ask Questions and get Answers. It seems to be a complete Question & Answer system. I can also upvote / downvote questions and answers and choose a best answer. You all should try this plugin once.
Now, User can create Unlimited Questions, Submit Answers, Search and Filter, Edit or Delete questions by their Categories.