Explanation:

The fort was known as Ahmednuggur Fort and was used by the British Raj as a prison and this was where Jawaharlal Nehru, Abul Kalam Azad, Sardar Patel and nine other members of the Indian National Congress were detained for almost three years after they passed the Quit India Resolution. Jawaharlal Nehru wrote his popular book -the Discovery of India- while he was imprisoned at Ahmednagar fort.