Lokesh with 120 marks in JEE Advanced examination under the general category according to last year cut-off which was 128 marks you won't even able to clear the cut-off. Although according to coaching expert's this year paper was a little difficult and as there is no mistakes in the question paper (last year 18 marks were given to each student) so it is expected that the cut-off will go down to 105-110 marks.

If according to prediction the cut-off goes down then you will be able to clear the cut-off but your rank will be very poor i.e. around 30,000 which will never fetch you any seat in any of the IITs. So, I will highly recommend you to start looking for colleges with your JEE Main exam's score.

Feel free to ask if you have any more queries. All the best!!