Given below are two statements $:$
Statement $(I):$ On hydrolysis,oligopeptides give rise to a fewer number of $\alpha$-amino acids,while proteins give rise to a large number of $\beta$-amino acids.
Statement $(II):$ Natural proteins are denatured by acids,which convert the water-soluble form of fibrous proteins to their water-insoluble form.
In the light of the above statements,choose the most appropriate answer from the options given below $:$

• A
  Both statement $I$ and statement $II$ are correct
• B
  Statement $I$ is incorrect but Statement $II$ is correct
• C
  Both statement $I$ and statement $II$ are incorrect
• D
  Statement $I$ is correct but Statement $II$ is incorrect