Correct Answer :   UAT (User Acceptance Testing)
                                        
                                                                                
                                        Explanation : 
User Acceptance Testing : Clients/end users are involved in testing the product to validate the product against their requirements.
 
2 types of UAT
* Alpha testing : Alpha Testing is a type of software testing performed to identify bugs before releasing the product to real users or to the public.
* Beta testing : Beta Testing is performed by real users of the software application in a real environment.