The correct answer is: A. 8th September
Assam Police Day is observed on 8th September every year to commemorate the formation of the Assam Police Force in 1835. The Assam Police Force is one of the oldest police forces in India and has a long and proud history of service to the people of Assam. The force has played a vital role in maintaining law and order in the state, and has also been at the forefront of the fight against insurgency and terrorism. The Assam Police Day is a day to celebrate the achievements of the Assam Police Force and to pay tribute to the sacrifices made by its members in the line of duty.
Option B, 13th January, is the birth anniversary of Mahatma Gandhi. Option C, 4th April, is the birth anniversary of Rabindranath Tagore. Option D, 1st October, is the birth anniversary of Jawaharlal Nehru.