Which of the following statements are not correct (a) All C – O bonds in CO3^2- are equal but not is H2CO3 (b) All C – O bonds in HCO2^- are equal nut not in HCO2H (c) C – O bond length in HCO2^- is longer than C -O bond length in CO3^2- (d) C -O bond length in HCO2^- and C -O bond length in CO3^2- are equal