Consider the following statements and select the correct answer from the codes given below: Assertion [A]: New folded mountains arc also called Tertian Mountains. Reason [R]: They are mainly formed along the constructive plate margins.

• A.  Both A and R are true and R is the correct explanation of A.
• B.  Both A and R arc true but R is not the correct explanation of A.
• C.  A is true but R is false.
• D.  A is false, but R is true.