Which of the following is a micronutrient? 

1. Fe, Mn, Zn, B, Cu, Ni, CI, and Mo are micronutrients that are needed in relatively smaller amounts.
2. These are the cofactors of enzymes that support the plant's enzymatic activity. 
3. One of the eight crucial micronutrients for plants is copper (Cu). 
4. Copper is necessary for the formation of chlorophyll, seeds, and numerous enzymatic processes in plants. 
5. A lack of copper can make plants more vulnerable to diseases like ergot, which can significantly reduce tiny grain yields. 
6. With its ability to catalyze more than 100 enzymes, aid protein folding, and help control gene expression, Zinc (Zn) is a crucial mineral for human metabolism. 
7. An increased risk of Zinc deficiency exists in patients with malnutrition, drunkenness, inflammatory bowel, and malabsorption disorders.

Hence, option B is the correct answer.