The correct answer is: A. 1912
Dada Saheb Phalke produced the first Indian feature film, Raja Harishchandra, in 1912. It was a silent film based on a Hindu mythological story. The film was a commercial success and is considered to be a landmark in the history of Indian cinema.
Option B is incorrect because 1913 is the year that Phalke produced his second feature film, Mohini Bhasmasur.
Option C is incorrect because 1911 is the year that Phalke produced his first short film, Raja Harishchandra (Prologue).
Option D is incorrect because 1910 is the year that Phalke produced his first documentary film, The Country of the Hindus.