- Statement I is true as collective farming is based on social ownership and collective labour, where land and resources are shared among farmers.
- Statement II is correct because collective farming was introduced in the Soviet Union, primarily in the form of collective farms.
- Statement III is incorrect, as in a collective farm, farmers typically share inputs and outputs equally, irrespective of their individual land sizes.
- Statement IV is correct as this type of collective farming is indeed called 'Kolkhoz' in the Soviet Union.
Thus, the correct option is (A).