The correct option is 2 and 3 only. In India, the retail price of chemical fertilizers such as urea is administered and subsidized by the government, not market-driven, to ensure affordability for farmers. Ammonia, used as a key input for urea, is indeed produced from natural gas, reflecting the importance of hydrocarbons in the fertilizer production process. Additionally, sulfur, a crucial raw material for phosphoric acid fertilizers, is obtained as a by-product from oil refineries, illustrating the interconnectedness of various industrial processes. Understanding these aspects is vital for addressing agricultural productivity and sustainability challenges in India.