What does the given structural formula represent?

In which organ of the human body does glycogenolysis occur?

Match the names of biomolecules listed under column $I$ with the characteristics given under column $II$; choose the answer which gives the correct combination of the alphabets of the two columns.

Column-$I$ (Biomolecule)	Column-$II$ (Characteristics)
$(A)$ $ATP$	$(p)$ One or more sugar monomers
$(B)$ $DNA$	$(q)$ The main source of energy
$(C)$ Protein	$(r)$ Two strands of nucleotides
$(D)$ Carbohydrate	$(s)$ Long sequence of amino acids

$A$: Living organisms obtain various molecules and elements from their environment.
$R$: Living organisms synthesize components essential for their body.

Which vitamins are water-soluble?

Commercial detergents contain mainly: