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
A 60-year-old alcoholic male presented with urinary incontinence and abnormal gait since 3 months. He also complains of loss of memory. What is the diagnosis? 
Select and explain. 
A. Huntington's disease, B. Normal pressure hydrocephalus, C. Wernicke's encephalopathy, D. Cynocobalamine deficiency
B: Normal pressure hydrocephalus
Answer: B: Normal pressure hydrocephalus 
Explanation: None