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: Dental
A patient comes with all the lower premolars and first
molar removed, should the second molars be removed why? 
Select and explain. 
A. Yes, it will help in taking support from the ridge, B. No, 2nd molars will help in determining the vertical dimension, C. No, because for designing RPD, sound posterior tooth with good bony support should not be extracted, D. Yes, it will help in extending the denture to retromolar pad to have good retention
C: No, because for designing RPD, sound posterior tooth with good bony support should not be extracted
Answer: C: No, because for designing RPD, sound posterior tooth with good bony support should not be extracted 
Explanation: None