A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ?

✅ C. Infrared Rays

✅ C. Radiation

✅ A. smallest particle of an element which can undergo a chemical reaction

✅ A. 250 million years

✅ C. periodicity of property

✅ A. Plants

✅ B. Carbon dioxide

✅ D. The astronaut and the spacecraft are both in a free-failing state