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: Biochemistry
[{'content': 'Isomer different in position for -H and -OH at 2nd, 3rd and 4th carbon atom of glucose are called as- \nSelect and explain. \nA. a) Optical isomers, B. b) Epimers, C. c) Anomers, D. d) D,L isomers', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Epimerism (Diastereoisomerism) - When sugars are different from one another, only in configuration with regard to a single carbon atom, other than the reference carbon atom, they are called epimers. Epimers of glucose-a) 2nd Epimer of Glucose - Mannoseb) 3rd Epimer of Glucose - Allosec) 4th Epimer of Glucose - Galactose', 'role': 'assistant'}]