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: Physiology
[{'content': 'Which among the following is a true statement about Thymosin? \nSelect and explain. \nA. A Pituitary hormone that regulates thymic development, B. A Glycoprotein that confers passive immunity to non sensitized hosts, C. An antiserum against thymocytes, D. A thymic hormone that induces maturation of pre-T cells', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Thymosin is a thymic hormone that regulates pre-T cell development. It is not released from the pituitary. Antithymocyte antibodies are not thymosin but are useful in transplantation rejection therapy. Lymphokines are released from T cells, but thymosin is a thymic hormone, not a lymphokine. Ref: Kipps T.J. (2010). Chapter 5. The Organization and Structure of Lymphoid Tissues. In J.T. Prchal, K. Kaushansky, M.A. Lichtman, T.J. Kipps, U. Seligsohn (Eds), Williams Hematology, 8e.', 'role': 'assistant'}]