ANS:C - a complex fertiliser

Calcium ammonium nitrate (CAN) is considered a complex fertilizer. A complex fertilizer is one that contains two or more primary nutrients, such as nitrogen (N), phosphorus (P), and potassium (K), in varying proportions. In the case of CAN, it contains a combination of nitrogen in the form of ammonium nitrate and calcium. This combination provides a balanced supply of nitrogen and calcium to plants, which are both essential nutrients for healthy growth and development. Complex fertilizers like CAN offer several advantages:

1. They provide a balanced nutrient supply, addressing multiple nutrient deficiencies in soils.
2. They offer convenience in application, as multiple nutrients are supplied in a single fertilizer product.
3. They can be tailored to meet specific crop nutrient requirements by adjusting the nutrient composition.