Correct option is (D) 30
Zinc is a transition metal with atomic number 30 and is represented by the symbol 'Zn' in the periodic table. Zinc is one of the beneficial metals we use on a daily basis. It is part of the elements that humans have been expanding for thousands of years. Zinc is an important element in the human body, where it is present in high concentrations in red blood cells as an integral part of the enzyme carbonic anhydrase, which causes many reactions related to carbon dioxide metabolism.
