Surgery Primary rotation force is applied for the extraction of: A Max. central incisor + Mandibular 2nd premolar. B Max. central incisor + Mandibular central incisor. C Max. premolars. D All of the above. 💡 Explanation Primary rotation force is applied for the extraction of: ✓ Correct Answer: A. Max. central incisor + Mandibular 2nd premolar.