The correct option is D 1, 2 and 3
Nutrients can be protein, carbohydrates, vitamins or minerals whose unbalanced proportion in human body can cause health problems. Malnutrition or poor nutrition is a state of unbalanced nutrition. It is either caused due to excess consumption of nutrients, causing mineral or vitamin poisoning(overnutrition) or inadequate absorption of only one or more nutrients resulting in weight loss(undernutrition).