The 1H NMR indicates there are three non-equivalent types of hydrogen atoms in your final compound with peaks at ~ 7.30 (m), 4.30(s), and 3.90(s) ppm. The three non-equivalent types of hydrogen atoms are aromatic hydrogens, methylene hydrogens, and the hydroxyl group. Which hydrogen atoms gave rise to the peak at ~ 7.30 ppm?
a. aromatic hydrogens
b. methylene hydrogens
c. hydroxyl hydrogen
d. solvent