The correct answer is Sir Syed Ahmad Khan. Explanation & Key Takeaways: • Sir Syed Ahmad Khan founded the Mohammedan Anglo-Oriental Defence Association in the year 1893 with the assistance of Theodore Beck. Hence option 4 is correct. • The main purpose of founding this association was to unite Muslims. • Mohammedan Anglo-Oriental Defence Association was established in 1893 by Syed Ahmad Khan as a part of the Aligarh movement. • He established it as he considered competence in English and "Western sciences" necessary skills for maintaining Muslims' political influence, especially in Northern India. • Also, the growing influence and popularity of the Congress became a cause of concern for the British. • In order to counter the growing influence of the Congress, the British encouraged the formation of the Mohammedan Anglo-Oriental (M.A.O.) Defence Association in the year 1893. Related Concepts: • Sir Auckland Colvin KCSI KCMG CIE was a colonial administrator in India and Egypt, born into the Anglo-Indian Colvin family. He was comptroller general in Egypt and financial adviser to the Khedive. • Badruddin Tyabji was an Indian lawyer, activist, and politician during British Raj. Tyabji was the first Indian to practice as a barrister of the High Court of Bombay who served as the third President of the Indian National Congress. • Theodore Beck was a Quaker and British educationalist working for the British Raj in India. From 1883 until his death in 1899 he was Principal of Muhammadan Anglo-Oriental College, which later became Aligarh Muslim University.