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: Surgery
Objective signs of inferior alveolar nerve block are seen in 
Select and explain. 
A. Unilateral midline between premolars & incisors, B. Bilaterally between premolar & incisors, C. Unilateral midline between 2nd molar & incisor, D. Bilateral midline between 2nd molar & incisor
A: Unilateral midline between premolars & incisors
Answer: A: Unilateral midline between premolars & incisors 
Explanation: None