Indian Polity · Polity

With reference to Article 14 of the Constitution of India, consider the following statements: I. Reasonable classification permits differential treatment if there is an intelligible differentia. II. The intelligible differentia must have a rational nexus with the object sought to be achieved. III. Classification based solely on administrative convenience is always valid under Article 14. IV. Article 14 prohibits class legislation but does not prohibit reasonable classification. Which of the statements given above are correct?