Biofortifications refers to the development of crop plants which are

Options

A. resistant to disease
B. resistant to insect pests
C. having improved nutritional quality
D. having improved iron content.

Explanation

### Step-by-Step Text Solution:

1. **Understanding Biofortification**: Biofortification is a process aimed at enhancing the nutritional quality of food crops. This is achieved through various methods such as conventional breeding, agronomic practices, or genetic engineering.

2. **Distinction from Fortification**: It is important to differentiate biofortification from traditional fortification. In biofortification, the nutritional value of the crops is improved during their growth phase. In contrast, traditional fortification involves enhancing the nutritional content during the processing of food after harvest.

3. **Nutritional Improvements**: Biofortification focuses on increasing specific nutrients in crops. For example, crops can be biofortified to have higher levels of iron, zinc, and other essential vitamins and minerals.

4. **Examples of Biofortified Crops**: Some common examples of biofortified crops include:
- Iron biofortified rice, wheat, and sweet potatoes.
- Zinc biofortified wheat, rice, and beans.

5. **Evaluating the Options**: The question asks about the characteristics of biofortified crops:
- Resistant to disease? (No)
- Resistant to insect pests? (Yes)
- Having improved nutritional quality? (Yes)
- Having improved iron content? (Yes, but not exclusively)

6. **Conclusion**: The correct answer to the question is that biofortification refers to the development of crop plants that have improved nutritional quality, which encompasses a range of nutrients, not just iron.