This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Radiology
Which of the following is contraindicated in a brain tumor patient? 
Select and explain. 
A. CT scan, B. MRI, C. PET, D. Lumbar puncture
D: Lumbar puncture
Answer: D: Lumbar puncture 
Explanation: Ans DAny intracranial space occupying lesion will result in increase in intracranial tension. Performing lumbar puncture in raised ICT results in tonsillar herniation which will affect vital centres adversely and can result in death.