Hello Ritika Nehra!

There basic criteria of calculating the marks for making the merit list is-
 ● 50% of the marks scored in 12th
 ● 50% of the marks scored in the entrance exam.

There is no as such cutoff for the examination, marks of 12th and entrance test are together taken into consideration, however a minimum of 85% in 12th and atleast 65 marks (out of 100) can get you a chance of getting a seat in 2nd or 3rd councelling.

And in case you are not able to get admission in UILS, Chandigarh, you might get admission in UILS, Ludhiana or Hoshiarpur.

All the best! Thankyou.