Identify (A) to (F):
`{:(underset(hv)overset(Cl_(2))rarr(A)underset((ii)HCO_(3)^())overset((i)DMSO)rarr(B)underset((ii)H_(3)O^(+))overset((i)CH_(3)Mgl)rarr(C)underset(Delta)overset(H_(2)SO_(4))rarr(D) overset(O_(3)//H_(2)O.//Zn)rarr(E)),(" "darr{:((i)","BH_(3)-TFH),((ii)","H_(2)O_(2)","OH^(-)):}),(" (F)"):}`
