Consider the following statements with reference to the difference between Article 323A and Article 323B:
1. Article 323A is for public service matters only, while Article 323B is for other matters.
2. Article 323A tribunals can be established only by Parliament, whereas Article 323B tribunals can be established by both Parliament and state legislatures.
3. There is a hierarchy of tribunals under Article 323A, whereas no hierarchy can be created under Article 323B.
How many of the above given statements are correct?