Correct Option: D

Chlorophyll, a photo-receptive pigment, allows plants to absorb sunlight and synthesize it into carbohydrates and oxygen. The basic formula for photosynthesis takes 6 molecules of carbon dioxide and 6 molecules of water, reacts them in the presence of chlorophyll and sunlight (a catalyst), and converts them into 1 molecule of glucose (C₆H₁₂O₆) and 6 molecules of oxygen. Chlorophyll is a chlorin pigment, which is structurally similar to and produced through the same metabolic pathway as other porphyrin pigments such as heme. At the center of the chlorin ring is a magnesium ion. The molecular formula of C₅₅H₇₀O₆N₄ Mg and a structure of (2-formyl)chlorophyll has been deduced based on NMR, optical and mass spectra.