Consider the following statements regarding biofortification:

1. It is the process by which the nutritional quality of food crops is improved through agronomic practices, conventional plant breeding, or modern biotechnology.

2. Bt-Cotton is a biofortified variety of cotton.

3. 17 biofortified varieties of 8 crops were recently dedicated to the nation on the occasion of the 75th Anniversary of the Agriculture and Food Organization (FAO), the United Nations by the Prime Minister.

4. It can be done using non-genetically-modified methods as well using traditional methods involving crossing varieties over successive generations.

Which of the above statements is/are correct?