Which of the following is not true about Tipu Sultan?

Among the given options, the statement that is not true about Tipu Sultan is Option B: His autobiography was Tarikh-i-Khudai. Tipu Sultan did not write an autobiography called "Tarikh-i-Khudai." This statement is incorrect.

Option A: Tipu Sultan was indeed an admirer of Jagadguru Sankaracharya of Sringeri, and he made grants to the Sringeri Matha (monastery) in Karnataka.
Option C: Tipu Sultan died during the fourth Anglo-Mysore war in 1799. He was killed in the battle while defending his capital, Srirangapatna.
Option D: Tipu Sultan was involved in various infrastructure projects. He laid the foundation of the Krishnaraja Sagar Dam on the Cauvery River to improve irrigation and water supply.

Therefore, the correct option is Option B: His autobiography was Tarikh-i-Khudai, as Tipu Sultan did not write an autobiography with that title.