Definition: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Input: In contrast to other related compounds, these compounds have their acidic side chains esterified with methanol or phytol. The "e" type is a rare type found in golden algae, while the "c" and "d" types are often found with the "a" type, which with the "b" type is the major type found in land plants and green algae. Found in the grana of plant cells, they are porphyrins which contain magnesium. FTP, what is this green pigment which allows plants to carry out the process of photosynthesis
Output:
Science