This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
Hay's sulpher test is used to detect w hich of the following - 
Select and explain. 
A. Bile salts in urine, B. Reducing sugar in urine, C. Ketone bodies in urine, D. Urobilinogen in urine
A: Bile salts in urine
Answer: A: Bile salts in urine 
Explanation: Ans. is 'a' i.e., Bile salts in urineTestsUsed foro Rothera's test (nitroprusside test)o Gerhardt's test (ferric chloride test)Ketone bodies in urine acetone and acetoacetateKetone bodies in urine acetoacetate.o Benedict's testo Fchling's testReducing sugars in urine Reducing sugars in urineo Hay's sulpher testBile salts in urineo Fouchet's (borium sulphate test)o Gmelin's (nitric acid) testo Vanden Bergh testo Ehrlich's testo Schlesinger's testBile pigment: bilirubinBile pigment: bilirubinBile pigment: bilirubinBilinogens (stercobilinogen, urobilinogen)Bilinsfstercobilin. urobilin).o Ehrlich's aldehyde testPorphobilinogen and urobilinogen in urine