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
SIADH is associated with which of the following drug? 
Select and explain. 
A. Vincristine, B. Erythromycin, C. 5-FU, D. Methotrexate
A: Vincristine
Answer: A: Vincristine 
Explanation: Treatment with vincristine is known to cause SIADH. Erythromycin, 5-FU and Methotrexate are not established causes of Syndrome of Inappropriate Antidiuretic Hormone hypersecretion (SIADH). Ref: Harrison's Principles of Internal Medicine, 16th Edition, Page 2102; Drug-Induced Diseases: Prevention, Detection, and Management, 2nd Edition, James E. Tisdale, Chapter 45, Page 887.