With reference to chemical fertilizers in India, consider the following statements : 1. At present, the retail price of chemical fertilizers is market-driven and not administered by the Government. 2. Ammonia, which is an input of urea, is produced from natural gas. 3. Sulphur, which is a raw material for phosphoric acid fertilizer, is a by-product of oil refineries. Which of the statements given above is/are correct ?

Statements 2 and 3 are correct because ammonia is synthesized from natural gas to produce urea, and sulphur is a major by-product of petroleum refining used in the production of phosphoric acid fertilizers. Statement 1 is incorrect because the retail price of urea is strictly controlled by the government through a fixed Maximum Retail Price (MRP), while other fertilizers are regulated under the Nutrient Based Subsidy (NBS) scheme. The core concept tested is the industrial supply chain and the government's regulatory framework governing the Indian fertilizer industry.