इंग्रजांबरोबर तैनाती फौजेचा करार करणारा पहिला भारतीय राज्यकर्ता म्हणजे ____ होय..

The correct answer is Option B (हैदराबादचा निजाम).

Key Points:
• The key concept is the Subsidiary Alliance (Tainati Fauj) system introduced by Lord Wellesley.
• The Subsidiary Alliance was a clever treaty system used by the British East India Company to subjugate Indian states by placing a British standing army in their territory at the ruler's expense.
• The Nizam of Hyderabad (Nizam Ali Khan) was the first Indian ruler to accept this alliance in 1798.
• Tipu Sultan famously refused the alliance (leading to the 4th Anglo-Mysore War). Peshwa Baji Rao II accepted it later in 1802 (Treaty of Bassein).
• Key Takeaway: The Nizam of Hyderabad was the first Indian ruler to accept Lord Wellesley's Subsidiary Alliance in 1798.