During the period 700 to 1400 AD many new developments were observed in India. Which of the following was/were the new developments?

1. One of the major developments of this period was the emergence of the idea of bhakti

2. Introduction of Persian wheel in irrigation, the spinning wheel in weaving, and firearms in combat

3. As society became more differentiated, people were grouped into jatis or sub-castes and ranked based on their backgrounds and their occupations

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