Chlorophyll contains

Correct answer: (c) Magnesium

Explanation

Chlorophyll is a porphyrin pigment with magnesium (Mg) as its central atom; its formula is C₅₅H₇₂O₅N₄Mg.

It drives photosynthesis by absorbing blue and red light, giving plants their green colour.

Contrast with haemoglobin, which uses iron as its central metal.