Iodimetric titrations are usually performed in neutral or mildly alkaline (pH=8) or weakly acidic solution. Which of the following statements is not valid for this observation?
A. In strong alkaline solution, I2 disproportionates to I− and IO−
B. In strong acidic solutions, starch used to detect the end point tends to hydrolyse or decompose
C. I− produced during titration tends to be oxidized by dissolved oxygen in acidic medium
D. Reducing power of reducing agent is increased in strong acidic medium