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: Pharmacology
Most important dose-limiting toxicity of cancer chemotherapy is : 
Select and explain. 
A. Gastrointestinal toxicity, B. Neurotoxicity, C. Bone marrow suppression, D. Nephrotoxicity
C: Bone marrow suppression
Answer: C: Bone marrow suppression 
Explanation: Depression of bone marrow is usually the most significant dose-limiting toxicity with cancer chemotherapy.