Given below are two statements :-
Statement $I$ :- In redox titration,the indicators used are sensitive to change in $pH$ of the solution.
Statement $II$ :- In acid-base titration,the indicators used are sensitive to change in oxidation potential.
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
  Statement $I$ is correct but Statement $II$ is incorrect.
• D
  Both statement $I$ and statement $II$ are incorrect.