n-octane when heated to 773 K under a pressure of 10- 20 atm and in presence of a mixture of Cr O , V O and Mo O supported over Al O as catalyst, gives

n-Octane when heated to773K under a pressure of 10- 20 atm and in presence of a mixture of 2 3 Cr O , 2 5 V O and 2 3 Mo O supported over 2 3 Al O as catalyst, generally gives a mixture of o-xylene, m-xylene and p- xylene. The following reaction is shown below: 3 2 2 2 2 2 2 3 2 3 2 3 2 3 2 3 Al O MO O ,V O ,Cr O H C – CH – CH – CH – CH – CH – CH – CH n octane -> Hence, the correct option is (d).