He wrote biographies of Mazzini, Garibaldi, Shivaji and Shrikrishna; stayed in America for some time; and was also elected to the Central Assembly. He was

1. The question lists several key biographical details associated with a prominent Indian nationalist leader. 2. Lala Lajpat Rai is known to have written biographies of figures like Mazzini, Garibaldi, Shivaji, and Shrikrishna to inspire Indians. 3. He stayed in America (USA) for a period, particularly between 1914 and 1919, advocating for the Indian cause. 4. He was indeed elected to the Central Assembly in 1926 as a member of the Swaraj Party, although he later withdrew. 5. These specific details collectively point strongly to Lala Lajpat Rai among the given options.