Galactosemia commonly is due to deficiency of_____________? September 27, 2025 by Admin A. Galactose 1 phosphatase uridyl transferase B. Galactose 1 phosphatase C. Glucose 1 phosphatase D. Glucose 6 phosphatase ✅ The correct answer is option A. Galactose 1 phosphatase uridyl transferase.