Incorrect statements among the following are

A) Nucleoside contains sugar and base.

B) Deoxy ribose is functional isomer ribose

C) Insulin is an amino acid hormone

D) Activity of enzyme is optimum at ${\mathrm{p}}^{\mathrm{H}}$ = 7

A) Nucleoside contains sugar and  base.

B)${\mathrm{C}}_5{\mathrm{H}}_{10}{\mathrm{O}}_5 . . . \mathrm{Ribose} ; {\mathrm{C}}_5{\mathrm{H}}_{10}{\mathrm{O}}_4. . . \mathrm{Deoxy} \mathrm{ribose}$

They are different compounds with different molecular formulae.

C) Insulin is a peptide hormone.

D) Activity of enzymes is optimum  at ${\mathrm{p}}^{\mathrm{H}}$ = 7