Which among the following statements is not correct?

• A. Omnivorous animals eat plants as well as flesh.
• B. Herbivorous animals eat only plants.
• C. \[{{\text{M}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\text{.3}{{\text{H}}_{\text{2}}}\text{O}\]
• D. Carnivorous birds have hooked beaks.
• E. None of these