The formation of starch in plants results from

Which of the following will give the same osazone when treated with phenylhydrazine?

Hydrolysis of sucrose with dilute aqueous sulphuric acid yields

Osazone formation involves only $2$ carbon atoms of glucose because of

$\alpha-D-(+)-$Glucose and $\beta-D-(+)-$Glucose are not

From the following, the correct statements about polysaccharides are:
$(I)$ Starch is a polymer of $\alpha-D(+)$-glucose.
$(II)$ Amylose component of starch is not soluble in water.
$(III)$ Amylose is a branched chain polymer of $\alpha-D(+)$-glucose.
$(IV)$ Cellulose is a straight chain polymer of $\beta-D(+)$-glucose units.