Create Added Indian History QA dataset file

Added Indian History QA dataset file

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+{"question": "When did the Maurya Empire start?", "answer": "Around 322 BCE under Chandragupta Maurya."}
+{"question": "Who was the first Mughal emperor?", "answer": "Babur."}
+{"question": "In which year did India gain independence?", "answer": "1947."}
+{"question": "Who wrote the book 'Discovery of India'?", "answer": "Jawaharlal Nehru."}