Consider the following statements regarding the ‘Nutrient Based Subsidy’ (NBS) Scheme:

1. It is applicable to phosphatic, potassic, and complex fertilizers.

2. It is also applicable to urea-based fertilizers.

3. The prices of fertilizers under the scheme are fully regulated by the government.

4. Subsidy is calculated on a per kg basis for each nutrient present in the fertilizer.

Select the correct answer using the code given below: