This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lung Tumors, Subject name: Pathology
Which is the most common site for extrathoracic metastases in patients with lung carcinoma - 
Select and explain. 
A. Kidneys, B. Liver, C. Vertebral body, D. Adrenal glands
D: Adrenal glands
Answer: D: Adrenal glands 
Explanation: Ans. is 'd' i.e.. Adrenal glands