“X” is having molecular formula C4H10O.(A)Number of  isomers of compound X giving  positive iodoform test(including stereoisomers) = a(B)Number of  isomers of compound X  which do not give H2 on treatment with Na metal (excluding stereoisomers) = b(C)Number of  isomers of compound X which  give red colour in Victor Mayer test = c Then a+b+c2 would be?