With reference to Sufism in Indian history, consider the following statements:

1. Shaikh Ahmad Sarhadi was a contemporary of Ibrahim Lodi.

2. Shaikh Nasiruddhin Chirg-i-Dehlavi was a disciple of Shaikh Nizamuddhin Auliya.

3. Aurangzeb was a Sufis was first Shaikh Salim Chisti.

4. The Qadiri order of Sufis was first introduced in India by Shaikh Niamatullah and Mukhdum Muhammad Jilani.

Which of these statements are correct ?