Can a CA do CS without giving information to institute...?

Of Course deepak you can.  But it will always involve a risk element.  So it's not recommended.  Moreover ICAI allows an addtional course so their is no need for hiding your cs unless you are already doing another course with permission from ICAI.

Perfectly agree with Mohit.

Intimate ICAI in from 112.

All the Best

Are giv them 112 yaar. Wats the problem in that. Be on a safer side.

yes,mohir is right

can  I do CA with B.Com.?