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: Forensic Medicine
[{'content': 'Hydrogen peroxide is used in all of the following chemical tests for blood except - \nSelect and explain. \nA. Benzidine test, B. Phenolphthalein test, C. orthotolidine test, D. Teichmann test', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All chemical tests which are used for detection of nature of blood stain are based on peroxidase enzyme and H2O2\xa0\n\xa0These tests are benzidine test, phenolphthalein test (Kastle meyer test), leucomalachite green test, guaiacum test, orthotolidine test (Kohn test) and amidopyrine test.', 'role': 'assistant'}]