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
Hydrogen peroxide is used in all of the following chemical tests for blood except - 
Select and explain. 
A. Benzidine test, B. Phenolphthalein test, C. orthotolidine test, D. Teichmann test
D: Teichmann test
Answer: D: Teichmann test 
Explanation: All chemical tests which are used for detection of nature of blood stain are based on peroxidase enzyme and H2O2 
 These tests are benzidine test, phenolphthalein test (Kastle meyer test), leucomalachite green test, guaiacum test, orthotolidine test (Kohn test) and amidopyrine test.