Albino phenomenon: refers to the phenomenon that under normal circumstances, plants cannot form chlorophyll due to certain internal factors. Which of the following is albino? ['After a few years of contamination in a certain place, people from time to time will find a white snake that has never appeared before contamination.', 'A farmer in a certain place found that the leaves of the local sunflower turned white, which was never found before the chemical plant was built.', 'Somewhere in the main corn-producing area for generations. Every year, some leaves of corn are found to have local white spots due to heredity.', "Someone got a disease more than a decade ago and hasn't healed yet, and his skin, hair, and even eyebrows have all turned white."]