Which of the following is a phase in the Software Development Life Cycle…

The Software Development Life Cycle (SDLC) is a structured process used to develop high-quality software. It consists of several distinct phases that guide the project from conception to maintenance. The Design phase involves planning the system architecture and user interface before development begins. Coding, also known as implementation, is where developers write the actual source code based on design specifications. Testing follows to identify and fix bugs, ensuring the software meets requirements. Since Design, Coding, and Testing are all fundamental stages within this lifecycle model, Option D is the correct choice. Each option listed represents a critical step in building reliable software systems.