C4H10 ---> CH4 + C3H6 fractia C1
C4H10 ---> C2H6 + C2H4 fractiile C2
dupa separarea fractiilor C1 si C2 ramane doar C3H6 (propena)
CH2=CH-CH3 + C6H6 --AlCl3--> CH3-CH(C6H5)-CH3
izopropilbenzen / majoritar
CH2=CH-CH3 + C6H6 --AlCl3--> CH2(C6H5)-CH2-CH3
n-propilbenzen / minoritaritar
=> 2 => B.