This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
The general test for detection of carbohydrates is 
Select and explain. 
A. Iodine test, B. Molisch test, C. Barfoed test, D. Osazone test
B: Molisch test
Answer: B: Molisch test 
Explanation: Molisch test: It is a general test for the detection of carbohydrates. The strong H2SO4 hydrolyzes carbohydrates (poly and disaccharides) to liberate monosaccharides. The monosaccharides get dehydrated to form furfural (from pentoses) or hydroxymethyl furfural (from hexoses) which condense with a-naphthol to form a violet colored complex. Ref: Biochemistry by U. Satyanarayana 3rd edition Pgno : 17