The sequence that targets protein to lysosmoes: (A) Glucose 6 - phosphate, (B) Mannose 6 - phosphate, (C) Ribose 5 - Phosphate, (D) Fructose 1 - phosphate
Answer is B. Mannose 6 - phosphate acts as a tag for the proteins to reach lysosomes. Defects in the process of tagging  this sequence to protein result in I - Cell disease.