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
Invert sugar, is 
Select and explain. 
A. equimolar mixture of glucose and fructose, B. equimolar mixture of Sucrose and glucose, C. equimolar mixture of Glucose and lactose, D. equimolar mixture of Glucose and lactose
A: equimolar mixture of glucose and fructose
Answer: A: equimolar mixture of glucose and fructose 
Explanation: Hydrolysis of sucrose (optical rotation +66.5°) will produce one molecule of glucose (+52.5°) and one molecule of fructose (–92°).
Therefore, the products will change the dextrorotation to levorotation, or the plane of rotation is inverted. Equimolecular mixture of glucose and fructose thus formed is called invert sugar. The enzyme producing hydrolysis of sucrose is called sucrase or invertase.
Honey contains invert sugar. Invert sugar is sweeter than sucrose.
Reference: Vasudevan 7th  ed, pg 77