Option 1 -> Mohammad Ali Jinnah joined the Muslim League later in 1913 and became its prominent leader.
Option 2 -> Maulana Abul Kalam Azad was a freedom fighter who opposed the Muslim League and stayed with the Indian National Congress.
Option 3 -> Liaquat Ali Khan became Pakistan's first Prime Minister but was not involved in founding the Muslim League in 1906.
Option 4 -> Nawab Khwaja Salimullah, the Nawab of Dhaka, played the key role in establishing the All-India Muslim League.
Hence, Option 4: Nawab Khwaja Salimullah -> The All-India Muslim League was founded on December 30, 1906, in Dhaka at the residence of Nawab Salimullah, who was instrumental in its establishment along with other Muslim leaders of that time -> correct