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
A 65-year-old smoker presents with hoarseness, hemoptysis and a hard painless lump in the left supraclavicular fossa. Which of the following is the most appropriate diagnostic step - 
Select and explain. 
A. Undeake an open biopsy of the neck lump, B. Undeake a radical neck dissection, C. Do fine needle aspiration cytology, D. Give a trial of Anti tuberculous therapy
A: Undeake an open biopsy of the neck lump
Answer: A: Undeake an open biopsy of the neck lump 
Explanation: Ans. is 'a' i.e., Undeake an open biopsy of the neck lump