Number of isomers possible for disubstituted borazine, `B_3N_3H_4X_2` is -

The number of isomers possible for disubstituted borazine, B_(3)N_(3)H_(4)X_(2) is

The number of isomers possible for disubstituted borazine with similar substituents is

The total number of isomers possible for the formula C_3H_4 is

Which of the following statement is is/are true - (I) Borazine is aromatic (II) There are four isotopic disubstitued borazine molecules B_(3)N_(3)H_(4)X_(2) (III) Borazine is more reactive towards additon reaction then benzene (IV) Banana bonds in B_(2)H_(6) are longer but stronger than normal B-H bonds

Which of the following statement is is/are true - (I) Borazine is aromatic (II) There are four isotopic disubstitued borazine molecules B_(3)N_(3)H_(4)X_(2) (III) Borazine is more reactive towards additon reaction then benzene (IV) Banana bonds in B_(2)H_(6) are longer but stronger than normal B-H bonds

The total number of isomer possible for the formula C_4H_10 is:

The total number of isomers of a disubstituted benzene compound is