This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Surgery
Diaphragm paralysis happens in which nerve damage 
Select and explain. 
A. Phrenic, B. Intercostal, C. Vagus, D. Hypoglossal
A: Phrenic
Answer: A: Phrenic 
Explanation: Ans. (a) Phrenic nerveRef: Internet sourcesCauses of Diaphragm paralysis:* Neurological causes:# Phrenic nerve palsy# Motor neuron disease# Neuropathies# Myopathies* Viral infections* Tumors* Trauma* Surgical Operations