Number of optical isomers in the open chain structure of glucose is

Which of the following reduces Tollens' reagent?

What are glucose and mannose to each other?

Predict the product of the following reaction:

Milk contains which of the following disaccharides?

Identify the correct conversion during acidic hydrolysis from the following $:$
$(A)$ Starch gives galactose.
$(B)$ Cane sugar gives an equal amount of glucose and fructose.
$(C)$ Milk sugar gives glucose and galactose.
$(D)$ Amylopectin gives glucose and fructose.
$(E)$ Amylose gives only glucose.
Choose the correct answer from the options given below $:$