This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification - Medicolegal aspects, Subject name: Forensic Medicine
Takayam test is used for? 
Select and explain. 
A. To know the nature of stain, B. To know the species, C. For blood grouping, D. None of the above
A: To know the nature of stain
Answer: A: To know the nature of stain 
Explanation: Ans. is 'a' i.e. To know the nature of stain o It is a microchemical test to know the nature of stain.Microchemical tests: These tests are based on property of haem part of hemoglobin to form characteristic coloured crystals.1) Teichmann's haemin crystal test2) Takayama hemochromogen crystal test3) Luminal spray test: It is especially useful in old obscure blood stains