The number of stuctural and configuration isomers of a bromo compound, `C_(5)H_(9)Br` formed on addition of HBr to 2-pentyne respectively are:

The number of structural and configurational isomers of a bromo compound, C_5H_9Br , formed by the addition of HBr to 2-pentyne respectively, is:

The number of structural isomers of for C_(4)H_(9)Cl are:

The number of structural isomers for C_(5)H_(10) are: