Option (B) is correct because Denmark is the country where co-operative farming was the most successful experiment. Co-operative farming is an organisation where farmers remain the owner of his land individually but farming is done jointly. In Denmark, the movement was so successful that every farmer becomes member of a co-operative.

Option (A) is not correct because Russia focused more on collective farming. Collective farming is based on social ownerships. It was introduced in erstwhile Soviet Union.

Option (C) is not correct because in India different types of farming are practised such as shifting agriculture, subsistence agriculture etc. Co-operative farming failed in India because all farmers are not agreed to grow same crop. Farmers expect more shares in profits compared to others.

Option (D) is not correct because in Netherland co-operative farming was practised but not so successful as compared to Denmark.