With reference to Simon Commission's recommendations, which one of the following statements is correct?

1. The Simon Commission submitted its report in 1930 with several recommendations for constitutional reforms in India. 2. A key recommendation was regarding governance in the provinces. The commission found the system of diarchy (dual government introduced by the 1919 Act, where some subjects were controlled by ministers responsible to the legislature and others by the Governor) to be unworkable and unpopular. 3. It recommended the abolition or replacement of diarchy in the provinces and the establishment of full responsible government, where provincial ministers would be fully accountable to the provincial legislatures for all departments. This makes statement (A) correct. 4. Statement (B) is incorrect; while federation was discussed, the proposal for an inter-provincial council under the Home Department was not a specific recommendation. 5. Statement (C) is incorrect; the Commission recommended retaining the bicameral legislature at the Centre. 6. Statement (D) regarding the creation of the Indian Police Service with differential pay is not among the main constitutional recommendations of the Commission.