Hey Vishal,

BSC.(hons.) Computer science comes under Mathematical Sciences.

• The minimum percentage required to get admission in this course- 60% or more in mathematics, 60% or more in aggregate of best four subjects including mathematics, One language and other two subjects.
•  The required subjects  from 12th are- Mathematics, One Language and other two subjects
  
• The other two subjects should be out of- Physics, Chemistry, Computer Sciences/ Informatin Practices.
  

In you case you can consider these subjects as your best of four- English(87), Mathematics(95), Computer Science(91), Physics(85).

Your best of four percentage- 89.5%

I hope this answers your question.