The correct options are
A the central atom in both HClO4 and HClO is sp3 hybridized
B the conjugate base of HClO4 is weaker base than H2O
D HClO4 is more acidic than HClO because of the resonance stabilization of its anion
The correct statement(s) about the oxoacids, HClO4 and HClO, are the following