Importance of Constitution

What is/are the major difference/ differences between a written and an unwritten constitution? 1. A written constitution is the formal source of all constitutional laws in the country and the unwritten constitution is not the formal source. 2. A written constitution is entirely codified whereas an unwritten constitution is not. Select the correct answer using the code given below :

Which of the following Articles of the Constitution of India has a provision for the Constitution of Legislatures in States?