(1) `underset("all isomers")(C_(2)FClBrI)overset(H_(2))underset(Ni)(to)(A)`(exclude stereoisomer)
(2) `underset("all isomers")(C_(4)H_(8)("alkene"))overset(H_(2))underset(Ni)(to)(B)("exclude stereoisomer")`
Total number of products A and B (i.e. A+B) is equal to: