what is the difference between ethical and discretionary responsibility of a business enterprise ?

These topics are already covered in our revision notes. Follow the link and scroll down to the topic "Kinds of Social Responsibilities" to view the same.

https://www.meritnation.com/cbse/class11-commerce/revision-notes/business-studies/business-studies-ncert-solutions/social-responsibilities-of-business-and-business-ethics/1350_5369