Question about response sheets

It will probably not affect...

My friend passed CS foundation and registered for Executive without submiting CC... Again after passing executive he got registered for Professional without submiting CC..

So I think CC is not compulsory for CS registration...

It will not effect your registeration.

You are already registered as a student of Professional Programme and passed Module 1 & 3, where is the question of your registration getting affected.

As far as submission of response sheets is concerned, the Institute has not made this mandatory.  It allows candidates from appearing for the respective examination by issuing admit cards. Hence, no need for you to worry at all, even if you do not submit the response sheet.