Albinism: refers to the phenomenon that plants cannot form chlorophyll due to some inherent factors under normal circumstances. Which of the following is albino? ['Somewhere is a generational corn production area, and every year, some leaves of corn are found to have local white spots due to heredity.', 'A farmer in a certain area found that the leaves of the local sunflower turned white, which was never found before the chemical plant was built.', 'After a few years of pollution in a place, people sometimes find a white snake in the locality that has never appeared before pollution.', "Someone got a disease more than ten years ago and hasn't healed yet, his skin, hair, and even eyebrows have all turned white."]