Consider the following statement1. Microwaves are used in radar system for air craft navigation2. Microwave ovens are used for cooking purposes3. A radar using microwave can help in detecting the speed of tennis ball, cricket ball, automobile while in motion.Which of these statements are correct?

• A. 1 and 2
• B. 2 and 3
• C. 1 and 3
• D. 1, 2 and 3