Question

Which of the following Supreme Court rulings made the posting of the Ten Commandments in public schools unconstitutional?

Answer 1

Stone v. Graham is the answer

hope it helped ;)

Answer 2

A Supreme Court ruling made the posting in each classroom in a public school of Ten Commandments as unconstitutional  Stone V. Graham.

It was called unconstitutional because it does not have any religious purpose. The court argued that it is a part of the curriculum.  Furthermore, it's against the Establishment Clause.