Which of the following are Incremental Developmental Models?1. Prototyping2. V model3. Rapid Action Development (RAD)4. Agile Development5. Rational Unified Process (RUP)6. Waterfall Model

• A. 1,2,4
• B. 1,3,4,5
• C. 1,2,3,4,5
• D. All of the above