(a)Naturally occuring DNA has $\beta$-configuration.
(b)Nucleic acids are derived from proteins.
(c)Proteins store genetic information
(d)Vitamins generally act as enzymes
Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
Natural DNA is mostly the right-handed B form; nucleic acids are not derived from proteins, proteins do not store genetic information and vitamins act as cofactors (a).