Which component in a V-shaped software development model corresponds to the testing phase?

In the V-shaped model , each development phase has a corresponding testing phase. Unit Testing corresponds to the initial stages of coding, where individual modules are tested to ensure they function correctly before being integrated with others. b) System Design : System Design refers to designing the software structure, not testing. c) Coding : Coding refers to the implementation phase, not testing. d) Requirements Gathering : This is the first step of development, not testing. e) Implementation : Implementation refers to putting the system into production, not to the testing phase.