This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Organ of adhesion of bacteria is - \nSelect and explain. \nA. Capsule, B. Slime, C. Flagella, D. Fimbriae', 'role': 'user'}, {'content': "Answer: D \nExplanation: Fimbriae \n\nSome gram negative bacilli carry hair like projections called fimbriae or pilli.\nPilli are composed of antigenic pilin.\nThey are unrelated to motility and are found on motile as well as nonmotile bacteria.\nFimbriae function as organs of adhesion, helping the cells to adhere firmly to particles of various kind.\n\n\nA special type of fimbriae is sex pills. These are found on 'male' bacteria and help in conjugation by forming conjugation tube through which genetic material is transferred from the donor to the recipient cell.", 'role': 'assistant'}]