The correct answer is: A. The Government of India Act of 1935.
The Government of India Act of 1935 was an act of the Parliament of the United Kingdom that granted greater autonomy to India. It divided India into provinces, with each province having its own government. Bihar was one of the provinces created by the act.
The other options are incorrect because they did not create the province of Bihar. The Indian Councils Act of 1909 was an act of the Parliament of the United Kingdom that reformed the legislative councils in India. The Government of India Act of 1919 was an act of the Parliament of the United Kingdom that further reformed the legislative councils in India and granted limited self-government to India. The Indian Independence Act of 1947 was an act of the Parliament of the United Kingdom that granted independence to India and Pakistan.
The Government of India Act of 1935 was a major turning point in the history of India. It marked the beginning of the end of British rule in India and the beginning of self-government for India. The act also created the province of Bihar, which is now one of the 28 states of India.