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: Psychiatry
Mini mental status is : 
Select and explain. 
A. Method to investigate common psychiatric problem, B. 30 point test to evaluate cognitive function, C. To evaluate schizophrenia, D. Instrument to measure delirium
B: 30 point test to evaluate cognitive function
Answer: B: 30 point test to evaluate cognitive function 
Explanation: The Mini Mental Status Examination (MMSE) is an easily administered 30 - point test of cognitive function.