Chlorophyll (also chlorophyl) is a term used for several closely related green pigments found in cyanobacteria and the chloroplast of algae and plants . Chlorophyll is an extremely important biomolecule, critical in photosynthesis, which allows plants to absorb energy from light.
Chlorophyll is a chlorin pigment, which is structurally similar to and produced through the same metabolic pathway as other pophyrin pigments such as heme. At the center of the chlorine ring, is a magnesium ion.
Hence, option 1 is correct.