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: Unknown
[{'content': 'Percentage total lymphocytes formed by null cells: \nSelect and explain. \nA. 0-1%, B. 2-3%, C. 5-10%, D. 10-15%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Refer: Anantha Narayanan and Paniker’s Textbook of Microbiology, 9th edition, pg no: 137)\nNull cells\n\n5 % of lymphocyte lack phenotypic markers of B or T lymphocytes\nMHC unrestricted & Non adherent\nAlso called as Large Granular Lymphocyte\nExpresses NCAM – I – CD 56 & Fc portion of Ig G – CD 16\nArise in both bone marrow & thymic environment\n\nComponents of Null cells\n\nK cell or ADCC lymphocyte\nNK cell – LAK cell (IL – 2) & NK/T cell (CD – 3)\n\nFunctions of Null cells', 'role': 'assistant'}]