Identify the incorrect statement regarding the properties of monosaccharides.

The concentration of glucose in the blood for normal body functions is.....

Which monosaccharide does not have the ratio of $H$ and $O$ atoms as $2:1$?

Which of the following is a disaccharide?

$A$ - Cellulose is a heteropolymer.
$R$ - Cellulose is made up of only one type of amino acid.

Given below are two statements.
Statement $I$ - Lactose on hydrolysis converts into glucose and galactose.
Statement $II$ - Galactose also plays the same role as glucose in respiration.
In the light of the above statements,select the correct option given below: