With reference to Simon Commission's recommendations, which one of the following statements is correct?
1. It recommended the replacement of diarchy with responsible government in the provinces.
2. It proposed the setting up of interprovincial council under the Home Department.
3. It suggested the abolition of bicameral legislature at the Centre.
4. It recommended the creation of Indian Police Service with a provision for increased pay and allowances for British recruits as compared to Indian recruits.