Correct statements among the following are

A) Nucleoside contains sugar, base and phosphate

B) Deoxy ribose is an isomer of ribose

C) Insulin is a peptide hormone

D) Activity of enzyme is optimum at ${\mathrm{p}}^{\mathrm{H}}$ = 1

• A

  C only

• B

  B, D only

• C

  A, C, D only

• D

  A, D only