Which of the following features of the Indian Judiciary are true?
I. Integrated Judicial system.
II. The Supreme Court is the highest court of appeal.
III. only the Supreme Court can interpret the Constitution.
IV. Public interest litigation (PIL) can be filed only in the Supreme court and the High courts.
1. I, II and III
2. I, II and IV
3. I, II and IV
4. II, III and IV