Correct trends from ClO– to ClO4– are    A) Oxidation ability decreases    B) Number of delocalised electrons increases    C) Number of lone electron pairs on chlorine decreases    D) O – Cl bond length decreases

Order of bond length of Cl–O in oxyanions is, ClO4– < ClO3– < ClO2– < ClO–  So   A) Oxidation ability decreases    B) Number of delocalised electrons increases    C) Number of lone electron pairs on chlorine decreases    D) O – Cl bond length decreasesAll are correct