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: Radiology
The facial root of premolar appears to be distal to the lingual root in X-ray. What will be the direction of projection? 
Select and explain. 
A. Changed vertical direction of projection, B. X-ray projected from distal side, C. X-ray projected from mesial side, D. Changing the tube film distance
C: X-ray projected from mesial side
Answer: C: X-ray projected from mesial side 
Explanation: None