In which one of the following provinces was a Congress ministry not formed under the Act of 1935?

1. The question asks in which province a Congress ministry was not formed after the provincial elections held under the Government of India Act of 1935 in 1937. 2. Congress formed ministries in several provinces, including Bihar, Madras, and Orissa. 3. In Punjab, the Unionist Party formed the government, and the Congress did not form a ministry. 4. Therefore, Punjab is the correct answer.