The success of the Hindi movement led Sir Syed to further advocate Urdu as the symbol of Muslim heritage and as the language of all Indian Muslims. His educational and political work grew increasingly centred around and exclusively for Muslim interests. He also sought to persuade the British to give Urdu extensive official use and patronage. His colleagues such as Mohsin-ul-Mulk and Maulvi Abdul Haq developed organisations such as the Urdu Defence Association and the Anjuman Taraqqi-i-Urdu, committed to the perpetuation of Urdu. All these colleagues led efforts that resulted in the adoption of Urdu as the official language of the Hyderabad State and as the medium of instruction in the Osmania University. To Muslims in northern and western India, Urdu had become an integral part of political and cultural identity. However, the division over the use of Hindi or Urdu further provoked communal conflict between Muslims and Hindus in India.