Which of the following compounds have the same oxidation lev

Which of the following compounds have the same oxidation level as the compound in column 1?
Enter your answer in numerical order as the column number(s) separated by commas, i.e. 2,3,5.
If none of the compounds have the same oxidation level, write \'none\'.

Solution

first set 1, 5

second set --- 1,3