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
Nerve which is likely to be involved in malignant spread and thyroid surgery? 
Select and explain. 
A. Recurrent laryngeal nerve, B. Superior laryngeal nerve, C. Internal laryngeal nerve, D. Both 1 and 2
D: Both 1 and 2
Answer: D: Both 1 and 2 
Explanation: The nerves found in close relationship to thyroid gland and therefore likely to be involved in malignant spread and thyroid surgery are recurrent laryngeal nerve and superior laryngeal nerve.