Plants require minor elements in small quantities, their major role is to act as
1. regulation of cell division of meristematic sites
2. co-factors of enzymes
3. building blocks of important amino acids
4. precursors of plant hormones

Options

A. regulation of cell division of meristematic sites
B. co-factors of enzymes
C. building blocks of important amino acids
D. precursors of plant hormones

Answer

2