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
Reciprocal arm assembly is placed at 
Select and explain. 
A. Gingival third, B. Junction of gingival third and middle third, C. Middle third, D. Junction of middle and occlusal third
B: Junction of gingival third and middle third
Answer: B: Junction of gingival third and middle third 
Explanation: Reciprocal elements of the clasp assembly should be located at the junction of the gingival and middle thirds of the crowns of abutment teeth.