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
Investigation of choice for leptomeningeal carcinomatosis - 
Select and explain. 
A. PET, B. SPECT, C. Gd enhanced MRI, D. CT scan
C: Gd enhanced MRI
Answer: C: Gd enhanced MRI 
Explanation: None