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: Medicine
In a chronic smoker, a highly malignant aggressive and metastatic lung carcinoma is - 
Select and explain. 
A. Squamous cell Carcinoma, B. Small cell Carcinoma, C. Adenocarcinoma, D. Large cell carcinoma
B: Small cell Carcinoma
Answer: B: Small cell Carcinoma 
Explanation: None