This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following step of glycolysis is inhibited by iodoacetate? 
Select and explain. 
A. Phosphoenol Pyruvate to Pyruvate, B. 2 Phosphoglycerate to Phosphoenol Pyruvate, C. Glyceradehyde 3 Phosphate to 1,3 bisphosphoglycerate, D. 3 Phosphoglycerate to 2 Phosphoglycerate
C: Glyceradehyde 3 Phosphate to 1,3 bisphosphoglycerate
Answer: C: Glyceradehyde 3 Phosphate to 1,3 bisphosphoglycerate 
Explanation: None