Consider the following statements regarding the philosophy and teachings of Guru Nanak:
1. He completely rejected sacrifices, ritual bathing, and the absolute authority of orthodox scriptures like the Vedas and the Quran.
2. While he believed in a formless God (Nirankar), he accepted the Hindu concept of divine incarnation (Avataravada) to guide humanity in times of crisis.
3. He fiercely condemned the caste system and emphasized equality through the institutions of 'Sangat' and 'Pangat'.
Which of the statements given above are correct?