Biochemistry Due to which of the following enzyme deficiency, vitamin C cannot be synthesised in humans? A L-Glucuronic acid oxidase B L-Gulonic acid reductase C L-Gulonolactone oxidase D L-Gulonolactone reductase 💡 Explanation Due to which of the following enzyme deficiency, vitamin C cannot be synthesised in humans? ✓ Correct Answer: C. L-Gulonolactone oxidase