The correct answer is: a) The early 20th century.
Vitasta was a significant literary magazine published in Lahore, British India (now in Pakistan) from 1913 to 1947. It was founded by Muhammad Iqbal, a poet and philosopher who is considered to be the national poet of Pakistan. The magazine published a wide range of literary works, including poetry, short stories, essays, and translations. It also featured articles on social and political issues. Vitasta was a major forum for the expression of Indian literary and intellectual thought in the early 20th century.
Option b) is incorrect because the magazine was not published in the 1960s-70s.
Option c) is incorrect because the magazine was not published in the 1990s.
Option d) is incorrect because the magazine is not currently active.