Explanation:

- Option 1: 1765:

- Not applicable for Tipu Sultan's rule. However, it was a period of complex regional changes in India.

- Option 2: 1782:

- Tipu Sultan ascended the throne of Mysore in 1782.

- He succeeded his father, Hyder Ali, after his death.

- This period marked the beginning of Tipu's efforts against British expansion.

- Correct Answer

- Option 3: 1775:

- Incorrect. Tipu was not the ruler in this year.

- During 1775, Hyder Ali was still the ruler of Mysore.

- Option 4: 1762:

- Incorrect, as this predates Tipu Sultan's reign.

- Tipu Sultan was involved in his father's military campaigns during this time.