Match the reactions in Column I with nature of the reactions `//` type of the products in Column II.
A. `O_(2)^(-)rarrO_(2)+O_(2)^(2)" "(p)` redox reaction
B. `CrO_(4)^(2-)+H^(+)rarr" "(q)` One of the products has trigonal planar structure
C. `MnO_(4)^(-)+NO_(2)^(-)+H^(+)rarr" "(r )` dimeric bridged tetrahdedral metal ion
D. `NO_(3)^(-)+H_(2)SO_(4)+Fe^(2+)rarr" "(s)` disproportionation