Answer: Death of Nizam-Ul-Mulk
Notes: After the death of Nizam-Ul-Mulk, a conflict was started between Nasir Jang (Second son of Nizam) and Muzaffar Jang (Grandson of Nizam) for taking the possession of the throne of Hyderabad. Meanwhile, another conflict was started between Anwar-Ud-Din and Chanda Sahib for taking possession of the throne of Carnatic. It was the immediate reason for the Second Carnatic War.
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