Why is glucose called gluco-pyranose?

$D$-Glucose and $L$-Glucose are

Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six-membered ring compounds) are insoluble in water. Explain.

Given below are two statements:
Statement $I$: Sucrose is dextrorotatory. However,sucrose upon hydrolysis gives a solution having a mixture of products. This solution shows laevorotation.
Statement $II$: Hydrolysis of sucrose gives glucose and fructose. Since the laevorotation of glucose is more than the dextrorotation of fructose,the resulting solution becomes laevorotatory.
In the light of the above statements,choose the correct answer from the options given below.

Among the following,the incorrect statement is

Which of the following reactions of glucose can be explained only by its cyclic structure?