Explanation:

- Option 1: Vithalbhai J. Patel

- Vithalbhai Jhaverbhai Patel was the first non-official elected as the Speaker of the Central Legislative Assembly on August 24, 1925.

- His election marked a significant development in India's legislative history, as he represented the focus on more Indian representation in legislative roles.

- Option 2: Muhammad Yakub

- There's no notable record of Muhammad Yakub being elected as the Speaker of the Central Legislative Assembly.

- Option 3: G. V. Mavalankar

- G. V. Mavalankar was the first Speaker of the Lok Sabha after India's independence in 1947.

- Option 4: Sardar Hukum Singh

- Sardar Hukum Singh served as the Speaker of the Lok Sabha in the 1960s.