This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'Cold haemagglutinin is associated with- \nSelect and explain. \nA. Anti Ig M, B. Anti Ig G, C. Anti Ig A, D. Donath Landsteiner antibody', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The cold hemagglutinin antibody titre is very high at 4 degree centigrade and very low at 37 degree centigrade which is confirmed by donath landsteiner test The Donath-Landsteiner test is a blood test to detect harmful antibodies related to a rare disorder called paroxysmal cold hemoglobinuria. These antibodies form and destroy red blood cells when the body is exposed to cold temperatures reference: textbook of Pathology, 7th edition ,author Harsha Mohan ,page number 289.', 'role': 'assistant'}]