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: ENT
Wagner and Grossman theory is related to: 
Select and explain. 
A. Palatal palsy, B. Vocal cord palsy, C. Facial palsy, D. Hypoglossal palsy
B: Vocal cord palsy
Answer: B: Vocal cord palsy 
Explanation: Semons law and wegner and Grossman hypothesis are both related to vocal cord palsy. Wagner grossman hypothesis states that in U/L recurrent laryngeal nerve palsy, cricothyroid muscle which receives innervation from superior laryngeal nerve keeps the cord in paramedian position due to its adduction action.