In the given question, the incorrect statement about the revolt of 1857 is option 1.

Option 1 states that the revolt was supported whole-heartedly by the educated, elite Indian everywhere. However, this statement is not correct. While it is true that there were Indian elites who supported the revolt, it was not whole-heartedly and universal. Many Indian elites were hesitant to join the revolt and did not openly show their support due to various reasons. Some feared the repercussions of rebelling against British rule, while others believed in a more peaceful and diplomatic approach to gain independence.

The other options provide correct statements about the revolt of 1857. Option 2 states that the diverse elements that took part in the revolt were united by their hatred of British Rule, which is true. Option 3 states that the role of Hindu-Muslim unity in the revolt was acknowledged by many, including British officials, which is also correct. Option 4 states that the revolt did not spread to South India, which aligns with historical records.

Overall, while the revolt of 1857 had significant support, it was not supported whole-heartedly by the educated, elite Indians everywhere.