Urea And DAP/MOP DAP

Consider the following statements with reference to the government interventions in Urea and DAP/MOP DAP (di-ammonium phosphate) MOP (muriate of potash):

1. Government sets a controlled Maximum Retail Price (MRP) at which urea must be sold to farmers.
2. Government involvement in DAP and MOP is limited to paying producers and importers a fixed nutrient based subsidy which works out to be roughly 35 per cent of the cost of production.
3. DAP and MOP producers and importers receive a Nutrient Based Subsidy (NBS) based on a formula that determines the amount of N, P and K in a given amount of fertiliser.
4. In case of Urea, imports are canalised—only selected agencies are allowed to import urea into India.

Choose the correct statement(s) from the codes given below: