Which of the following conditions apply to resonating structures? (i) Identical arrangements of atoms (ii) Nearly same energy content (iii) Identical number of bonds (iv) Same number of unpaired electrons

Question

$(a)\;\text{(i),(ii) and (iii) } \\ (b)\;\text{(i),(ii) and (iv)} \\(c)\;\text{(i),(iii) and (iv) } \\(d)\;\text{(ii),(iii) and (iv)} $