Which trace element acts as a cofactor for the enzyme superoxide dismutase, which protects cells from oxidative damage?

A Copper
B Zinc
C Manganese ✓
D Iron

Explanation

Manganese is a cofactor for the enzyme superoxide dismutase, which helps to neutralize free radicals and protect cells from oxidative damage.

Source

Biochemistry by Lubert Stryer
Minerals and Trace Elements Antioxidant Defense Enzyme Cofactors Medium MEDICAL Confidence: medium